diff --git a/Sanitize.md b/Sanitize.md
new file mode 100644
index 00000000..2af8448d
--- /dev/null
+++ b/Sanitize.md
@@ -0,0 +1,67 @@
+# Sanitize
+
+The SNDS sources used for the extraction are raw data from the CNAM. Thus, they need to be sanitized before any event extraction.
+
+
+We use some classical data quality rules for the SNDS. The details on the name of the variables and on these rules can be found (in french) on the [SNDS collaborative documentation website](https://documentation-snds.health-data-hub.fr/). The source code corresponding to this filtering can be found in the [etl/sources/](/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/) folder:
+
+* **DCIR**: 
+    * `DPN_QLF` ≠ "71", remove the lines [for information only](https://documentation-snds.health-data-hub.fr/ressources/documents%20Cnam/faq/faq_dcir.html#dcir) : these lines correspond to services carried out during a stay or an outpatient consultation and sent for information,
+    * `BSE_PRS_NAT` ≠ "0", remove the lines without a proper *Nature de la prestation*.
+* **PMSI**:
+  * For all PMSI products ([see details here](https://documentation-snds.health-data-hub.fr/fiches/depenses_hopital_public.html#valorisation-des-sejours-a-l-hopital-public)):
+    * `ETA_NUM` $`\notin`$ `finessDoublons`(cf. end of document), remove information reported by geogaphic FINESS for APHP, HCL and APHM (duplicates for this information also goes back through legal FINESS).
+  * **MCO**:
+    * `SEJ_TYP` = $`\empty`$ OR !(`ENT_MOD` == 1 AND `SOR_MOD` == 1) OR (`GRG_GHM` like "28%" AND `GRG_GHM` $`\notin`$ {"28Z14Z", "28Z15Z", "28Z16Z"}), remove inter-caresites prestations except for radiotherapies and dyalises,
+    * `GRG_GHM` ≠ "14Z08Z", remove induced abortion (IVG) hospital stays, IVG can be made anonymously, thus they cannot be linked with certainty to a given individual,
+    * `GHS_NUM` ≠ "9999", remove hospital stays in error.,
+    * {`SEJ_RET`, `FHO_RET`, `PMS_RET`, `DAT_RET`, `NIR_RET`, `SEX_RET`} = "0", remove corrupted patient id or sex,
+    * `GRG_GHM` `\notlike` "90%", remove corrupted patient grouping codes.
+  * **MCO_CE**:
+    * {`NAI_RET`, `IAS_RET`, `ENT_DAT_RET`, `NIR_RET`, `SEX_RET`} = "0", remove corrupted patient id or sex.
+  * **SSR**:
+      * !(`ENT_MOD` == 1 AND `SOR_MOD` == 1) OR (`GRG_GME` like "28%" AND `GRG_GME` $`\notin`$ {"28Z14Z", "28Z15Z", "28Z16Z"}), remove inter-caresites prestations except for radiotherapies and dyalises,
+      * {`NIR_RET`, `SEJ_RET`, `FHO_RET`, `PMS_RET`, `DAT_RET`} = "0" (for **SSR**), remove corrupted hospital stay, date or patient id,
+      * `GRG_GME` `\notlike` "90%", remove corrupted patient grouping codes.
+  * **SSR_CE**:
+    * {`NIR_RET`, `NAI_RET`, `SEX_RET`, `IAS_RET`, `ENT_DAT_RET`} ="0" (for **SSR_CE**), remove corrupted hospital stay, date or patient id.
+  * **HAD**:
+    * !(`ENT_MOD` == 1 AND `SOR_MOD` == 1), remove inter-caresites prestations,
+    * {`NIR_RET`, `SEJ_RET`, `FHO_RET`, `PMS_RET`, `DAT_RET`} = "0", remove corrupted hospital stay, date or patient id. 
+
+
+## Details of the Finess doublons
+
+```scala
+val finessDoublons = List(
+    //APHP 
+    "600100093","600100101","620100016","640790150","640797098","750100018","750806226", 
+    "750100356","750802845","750801524","750100067","750100075","750100042","750805228",
+    "750018939","750018988","750100091","750100083","750100109","750833345","750019069",
+    "750803306","750019028","750100125","750801441","750019119","750100166","750100141",
+    "750100182","750100315","750019648","750830945","750008344","750803199","750803447",
+    "750100216","750100208","750833337","750000358","750019168","750809576","750100299",
+    "750041543","750100232","750802258","750803058","750803454","750100273","750801797",
+    "750803371","830100012","830009809","910100015","910100031","910100023","910005529",
+    "920100013","920008059","920100021","920008109","920100039","920100047","920812930",
+    "920008158","920100054","920008208","920100062","920712551","920000122","930100052",
+    "930100037","930018684","930812334","930811294","930100045","930011408","930811237",
+    "930100011","940018021","940100027","940100019","940170087","940005739","940100076",
+    "940100035","940802291","940100043","940019144","940005788","940100050","940802317",
+    "940100068","940005838","950100024","950100016",
+    //APHM                   
+    "130808231","130809775","130782931",
+    "130806003","130783293","130804305","130790330","130804297","130783236","130796873",
+    "130808520","130799695","130802085","130808256","130806052","130808538","130802101",
+    "130796550","130014558","130784234","130035884","130784259","130796279","130792856",
+    "130017239","130792534","130793698","130792898","130808546","130789175","130780521",
+    "130033996","130018229", 
+    //HCL                   
+    "90787460","690007422","690007539","690784186","690787429",
+    "690783063","690007364","690787452","690007406","690787486","690784210","690799416",
+    "690784137","690007281","690799366","690784202","690023072","690787577","690784194",
+    "690007380","690784129","690029194","690806054","690029210","690787767","690784178",
+    "690783154","690799358","690787817","690787742","690784152","690784145","690783121",
+    "690787478","690007455","690787494","830100558","830213484"
+    )
+```
\ No newline at end of file
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFilters.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFilters.scala
index c0f24456..147ab42d 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFilters.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFilters.scala
@@ -4,6 +4,23 @@ import fr.polytechnique.cmap.cnam.etl.sources.data.DoublonFinessPmsi.specialHosp
 import org.apache.spark.sql.{Column, DataFrame}
 
 private[data] class HadFilters(rawHad: DataFrame) {
+  /** Remove geographic finess doublons from APHP, APHM and HCL.
+    *
+    * @return dataframe without finess doublons
+    */
+  def filterSpecialHospitals: DataFrame = {
+    rawHad.where(!HadSource.ETA_NUM_EPMSI.isin(specialHospitalCodes: _*))
+  }
+
+  /** Filter out shared stays (between hospitals).
+    *
+    * @return
+    */
+  def filterSharedHospitalStays: DataFrame = {
+    val duplicateHospitalsFilter: Column = !(HadSource.ENT_MOD === 1 and HadSource.SOR_MOD === 1)
+    rawHad.filter(duplicateHospitalsFilter)
+  }
+
   /** Filter out Had corrupted stays as returned by the ATIH.
     *
     * @return dataframe cleaned of HAD corrupted stays
@@ -13,16 +30,7 @@ private[data] class HadFilters(rawHad: DataFrame) {
       .NIR_RET === "0" and HadSource.SEJ_RET === "0" and HadSource
       .FHO_RET === "0" and HadSource.PMS_RET === "0" and HadSource
       .DAT_RET === "0"
-
     rawHad.filter(fictionalAndFalseHospitalStaysFilter)
   }
-
-  /** Remove geographic finess doublons from APHP, APHM and HCL.
-    *
-    * @return dataframe without finess doublons
-    */
-  def filterSpecialHospitals: DataFrame = {
-    rawHad.where(!HadSource.ETA_NUM_EPMSI.isin(specialHospitalCodes: _*))
-  }
 }
 
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSource.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSource.scala
index 85b90dde..27c4a15b 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSource.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSource.scala
@@ -11,6 +11,9 @@ import org.apache.spark.sql.{Column, DataFrame, SQLContext}
 object HadSource extends DataSourceManager with HadSourceSanitizer {
 
   val ETA_NUM_EPMSI: Column = col("ETA_NUM_EPMSI")
+
+  val ENT_MOD: Column = col("HAD_B__ENT_MOD")
+  val SOR_MOD: Column = col("HAD_B__SOR_MOD")
   val NIR_RET: Column = col("NIR_RET")
   val SEJ_RET: Column = col("SEJ_RET")
   val FHO_RET: Column = col("FHO_RET")
@@ -24,7 +27,8 @@ object HadSource extends DataSourceManager with HadSourceSanitizer {
       * https://datainitiative.atlassian.net/wiki/pages/viewpage.action?pageId=40304642
       */
     rawHad
-      .filterHadCorruptedHospitalStays
       .filterSpecialHospitals
+      .filterSharedHospitalStays
+      .filterHadCorruptedHospitalStays
   }
 }
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFilters.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFilters.scala
index 9ae8a425..0412a88a 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFilters.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFilters.scala
@@ -19,8 +19,8 @@ private[data] class McoFilters(rawMco: DataFrame) {
     * @return
     */
   def filterSharedHospitalStays: DataFrame = {
-    val duplicateHospitalsFilter: Column = McoSource.SEJ_TYP.isNull or McoSource
-      .SEJ_TYP =!= "B" or (McoSource.GRG_GHM.like("28%") and !McoSource.GRG_GHM
+    val duplicateHospitalsFilter: Column = McoSource.SEJ_TYP.isNull or
+      !(McoSource.ENT_MOD === 1 and McoSource.SOR_MOD === 1) or (McoSource.GRG_GHM.like("28%") and !McoSource.GRG_GHM
       .isin(McoFilters.GRG_GHMExceptions: _*))
     rawMco.filter(duplicateHospitalsFilter)
   }
@@ -69,5 +69,4 @@ private[data] class McoFilters(rawMco: DataFrame) {
 private[data] object McoFilters {
   // radiotherapie & dialyse exceptions
   val GRG_GHMExceptions = List("28Z14Z", "28Z15Z", "28Z16Z")
-
 }
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSource.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSource.scala
index df8810b5..0f1afde6 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSource.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSource.scala
@@ -19,6 +19,8 @@ object McoSource extends DataSourceManager with McoSourceSanitizer {
 
   // Exclusive columns
   val SEJ_TYP: Column = col("MCO_B__SEJ_TYP")
+  val ENT_MOD: Column = col("MCO_B__ENT_MOD")
+  val SOR_MOD: Column = col("MCO_B__SOR_MOD")
   val GRG_GHM: Column = col("MCO_B__GRG_GHM")
   val GHS_NUM: Column = col("MCO_B__GHS_NUM")
   val SEJ_RET: Column = col("SEJ_RET")
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFilters.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFilters.scala
index c0d9a54c..77a3428c 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFilters.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFilters.scala
@@ -4,6 +4,25 @@ import fr.polytechnique.cmap.cnam.etl.sources.data.DoublonFinessPmsi.specialHosp
 import org.apache.spark.sql.{Column, DataFrame}
 
 private[data] class SsrFilters(rawSsr: DataFrame) {
+  /** Filter out Finess doublons.
+    *
+    * @return
+    */
+  def filterSpecialHospitals: DataFrame = {
+    rawSsr.where(!SsrSource.ETA_NUM.isin(specialHospitalCodes: _*))
+  }
+
+  /** Filter out shared stays (between hospitals).
+    *
+    * @return
+    */
+  def filterSharedHospitalStays: DataFrame = {
+    val duplicateHospitalsFilter: Column = !(SsrSource.ENT_MOD === 1 and SsrSource.SOR_MOD === 1) or
+      (SsrSource.GRG_GME.like("28%") and !SsrSource.GRG_GME
+      .isin(SsrFilters.GRG_GHMExceptions: _*))
+    rawSsr.filter(duplicateHospitalsFilter)
+  }
+
   /** Filter out Ssr corrupted stays as returned by the ATIH.
     *
     * @return
@@ -28,14 +47,9 @@ private[data] class SsrFilters(rawSsr: DataFrame) {
 
     rawSsr.filter(fictionalAndFalseHospitalStaysFilter)
   }
-
-  /** Filter out Finess doublons.
-    *
-    * @return
-    */
-  def filterSpecialHospitals: DataFrame = {
-    rawSsr.where(!SsrSource.ETA_NUM.isin(specialHospitalCodes: _*))
-  }
 }
 
-private[data] object SsrFilters
\ No newline at end of file
+private[data] object SsrFilters {
+  // radiotherapie & dialyse exceptions
+  val GRG_GHMExceptions = List("28Z14Z", "28Z15Z", "28Z16Z")
+}
diff --git a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSource.scala b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSource.scala
index 500cc119..b71cced0 100644
--- a/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSource.scala
+++ b/src/main/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSource.scala
@@ -20,6 +20,9 @@ object SsrSource extends DataSourceManager with SsrSourceSanitizer {
   val MOI_ANN_SOR_SEJ: Column = col("SSR_B__MOI_ANN_SOR_SEJ")
   val RHS_ANT_SEJ_ENT: Column = col("SSR_B__RHS_ANT_SEJ_ENT")
   val FP_PEC: Column = col("SSR_B__FP_PEC")
+
+  val ENT_MOD: Column = col("SSR_B__ENT_MOD")
+  val SOR_MOD: Column = col("SSR_B__SOR_MOD")
   val GRG_GME: Column = col("SSR_B__GRG_GME")
   val NIR_RET: Column = col("NIR_RET")
   val SEJ_RET: Column = col("SEJ_RET")
@@ -41,6 +44,7 @@ object SsrSource extends DataSourceManager with SsrSourceSanitizer {
       */
     rawSsr
       .filterSpecialHospitals
+      .filterSharedHospitalStays
       .filterSsrCorruptedHospitalStays
   }
 }
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFiltersSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFiltersSuite.scala
index ed08df5c..8c41c44f 100644
--- a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFiltersSuite.scala
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadFiltersSuite.scala
@@ -38,4 +38,33 @@ class HadFiltersSuite extends SharedContext {
     assertDFs(result, expected)
   }
 
+  "filterSharedHospitalStays" should "remove lines that indicates shared hospital stays" in {
+    val sqlCtx = sqlContext
+    import sqlCtx.implicits._
+
+    // Given
+    val colNames = List(
+      HadSource.ENT_MOD,
+      HadSource.SOR_MOD
+    ).map(col => col.toString)
+
+    val input = Seq(
+      ("2", "3"),
+      ("1", "3"),
+      ("1", "1")
+    ).toDF(colNames: _*)
+
+
+    val expected = Seq(
+      ("2", "3"),
+      ("1", "3")
+    ).toDF(colNames: _*)
+
+    // When
+    val instance = new HadFilters(input)
+    val result = instance.filterSharedHospitalStays
+
+    // Then
+    assertDFs(result, expected)
+  }
 }
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSourceSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSourceSuite.scala
index e28694c0..86b30e9a 100644
--- a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSourceSuite.scala
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/HadSourceSuite.scala
@@ -9,6 +9,8 @@ class HadSourceSuite extends SharedContext {
 
     // Given
     val colNames = List(
+      HadSource.ENT_MOD,
+      HadSource.SOR_MOD,
       HadSource.NIR_RET,
       HadSource.SEJ_RET,
       HadSource.FHO_RET,
@@ -18,15 +20,16 @@ class HadSourceSuite extends SharedContext {
     ).map(col => col.toString)
 
     val input = Seq(
-      ("1", "0", "0", "0", "0", "100000000"),
-      ("1", "1", "0", "0", "0", "100000001"),
-      ("0", "0", "0", "0", "0", "100000001"),
-      ("0", "0", "0", "0", "0", "910100015")
+      ("2", "3", "1", "0", "0", "0", "0", "100000000"),
+      ("2", "3", "1", "1", "0", "0", "0", "100000001"),
+      ("2", "3", "0", "0", "0", "0", "0", "100000001"),
+      ("2", "3", "0", "0", "0", "0", "0", "910100015"),
+      ("1", "1", "0", "0", "0", "0", "0", "100000001")
 
     ).toDF(colNames: _*)
 
     val expected = Seq(
-      ("0", "0", "0", "0", "0", "100000001")
+      ("2", "3", "0", "0", "0", "0", "0", "100000001")
     ).toDF(colNames: _*)
 
     // When
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFiltersSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFiltersSuite.scala
index a34b09e2..6e4fac6c 100644
--- a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFiltersSuite.scala
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoFiltersSuite.scala
@@ -51,26 +51,28 @@ class McoFiltersSuite extends SharedContext {
     // Given
     val colNames = List(
       McoSource.SEJ_TYP,
+      McoSource.ENT_MOD,
+      McoSource.SOR_MOD,
       McoSource.GRG_GHM
     ).map(col => col.toString)
 
     val input = Seq(
-      (None, "28XXXX"),
-      (Some("A"), "15A94Z"),
-      (Some("B"), "15A94Z"),
-      (Some("A"), "28XXXX"),
-      (Some("A"), "28Z14Z"),
-      (Some("B"), "28XXXX"),
-      (Some("B"), "28Z14Z")
+      (None, "2", "3", "28XXXX"),
+      (Some("A"), "2", "3", "15A94Z"),
+      (Some("B"), "1", "1", "15A94Z"),
+      (Some("A"), "2", "3", "28XXXX"),
+      (Some("A"), "2", "3", "28Z14Z"),
+      (Some("B"), "1", "1", "28XXXX"),
+      (Some("B"), "1", "1", "28Z14Z")
     ).toDF(colNames: _*)
 
 
     val expected = Seq(
-      (None, "28XXXX"),
-      (Some("A"), "15A94Z"),
-      (Some("A"), "28XXXX"),
-      (Some("A"), "28Z14Z"),
-      (Some("B"), "28XXXX")
+      (None, "2", "3", "28XXXX"),
+      (Some("A"), "2", "3", "15A94Z"),
+      (Some("A"), "2", "3", "28XXXX"),
+      (Some("A"), "2", "3", "28Z14Z"),
+      (Some("B"), "1", "1", "28XXXX")
     ).toDF(colNames: _*)
 
     // When
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSourceSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSourceSuite.scala
index b6e9a8c5..66281d31 100644
--- a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSourceSuite.scala
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/McoSourceSuite.scala
@@ -19,28 +19,30 @@ class McoSourceSuite extends SharedContext {
       McoSource.DAT_RET,
       McoSource.ETA_NUM,
       McoSource.GHS_NUM,
-      McoSource.SEJ_TYP
+      McoSource.SEJ_TYP,
+      McoSource.ENT_MOD,
+      McoSource.SOR_MOD
     ).map(col => col.toString)
 
     val input = Seq(
-      ("90XXXX", "1", "1", "1", "1", "1", "1", "3333", Some("A")),
-      ("27XXXX", "1", "1", "1", "1", "1", "2", "3424", Some("A")),
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("A")),
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", None),
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B")),
-      ("28XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B")),
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "9999", Some("A")),
-      ("76XXXX", "0", "0", "0", "0", "0", "910100023", "1111", Some("B")),
-      ("28XXXX", "0", "0", "0", "0", "0", "1", "2222", Some("A")),
-      ("28XXXX", "0", "0", "0", "0", "0", "130784234", "1981", Some("A"))
+      ("90XXXX", "1", "1", "1", "1", "1", "1", "3333", Some("A"), "2", "3"),
+      ("27XXXX", "1", "1", "1", "1", "1", "2", "3424", Some("A"), "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("A"), "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", None, "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B"), "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B"), "1", "1"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "9999", Some("A"), "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "910100023", "1111", Some("B"), "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "2222", Some("A"), "2", "3"),
+      ("28XXXX", "0", "0", "0", "0", "0", "130784234", "1981", Some("A"), "2", "3")
     ).toDF(colNames: _*)
 
 
     val expected = Seq(
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("A")),
-      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", None),
-      ("28XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B")),
-      ("28XXXX", "0", "0", "0", "0", "0", "1", "2222", Some("A"))
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("A"), "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "8271", None, "2", "3"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "8271", Some("B"), "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "2222", Some("A"), "2", "3")
     ).toDF(colNames: _*)
 
     // When
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFiltersSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFiltersSuite.scala
index be45b2c1..635d3982 100644
--- a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFiltersSuite.scala
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrFiltersSuite.scala
@@ -69,4 +69,42 @@ class SsrFiltersSuite extends SharedContext {
     // Then
     assertDFs(result, expected)
   }
+
+  "filterSharedHospitalStays" should "remove lines that indicates shared hospital stays" in {
+    val sqlCtx = sqlContext
+    import sqlCtx.implicits._
+
+    // Given
+    val colNames = List(
+      SsrSource.ENT_MOD,
+      SsrSource.SOR_MOD,
+      SsrSource.GRG_GME
+    ).map(col => col.toString)
+
+    val input = Seq(
+      ("2", "3", "28XXXX"),
+      ("2", "3", "15A94Z"),
+      ("1", "1", "15A94Z"),
+      ("2", "3", "28XXXX"),
+      ("2", "3", "28Z14Z"),
+      ("1", "1", "28XXXX"),
+      ("1", "1", "28Z14Z")
+    ).toDF(colNames: _*)
+
+
+    val expected = Seq(
+      ("2", "3", "28XXXX"),
+      ("2", "3", "15A94Z"),
+      ("2", "3", "28XXXX"),
+      ("2", "3", "28Z14Z"),
+      ("1", "1", "28XXXX")
+    ).toDF(colNames: _*)
+
+    // When
+    val instance = new SsrFilters(input)
+    val result = instance.filterSharedHospitalStays
+
+    // Then
+    assertDFs(result, expected)
+  }
 }
diff --git a/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSourceSuite.scala b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSourceSuite.scala
new file mode 100644
index 00000000..0c52443f
--- /dev/null
+++ b/src/test/scala/fr/polytechnique/cmap/cnam/etl/sources/data/SsrSourceSuite.scala
@@ -0,0 +1,53 @@
+// License: BSD 3 clause
+
+package fr.polytechnique.cmap.cnam.etl.sources.data
+
+import fr.polytechnique.cmap.cnam.SharedContext
+
+class SsrSourceSuite extends SharedContext {
+  "sanitize" should "return lines that are not corrupted" in {
+    val sqlCtx = sqlContext
+    import sqlCtx.implicits._
+
+    // Given
+    val colNames = List(
+      SsrSource.GRG_GME,
+      SsrSource.NIR_RET,
+      SsrSource.SEJ_RET,
+      SsrSource.FHO_RET,
+      SsrSource.PMS_RET,
+      SsrSource.DAT_RET,
+      SsrSource.ETA_NUM,
+
+      SsrSource.ENT_MOD,
+      SsrSource.SOR_MOD
+    ).map(col => col.toString)
+
+    val input = Seq(
+      ("90XXXX", "1", "1", "1", "1", "1", "1", "2", "3"),
+      ("27XXXX", "1", "1", "1", "1", "1", "2", "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "1", "1"),
+      ("90XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "910100023", "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("28XXXX", "0", "0", "0", "0", "0", "130784234", "2", "3")
+    ).toDF(colNames: _*)
+
+
+    val expected = Seq(
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("76XXXX", "0", "0", "0", "0", "0", "1", "2", "3"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "1", "1"),
+      ("28XXXX", "0", "0", "0", "0", "0", "1", "2", "3")
+    ).toDF(colNames: _*)
+
+    // When
+    val result = SsrSource.sanitize(input)
+
+    // Then
+    assertDFs(result, expected)
+  }
+}