diff --git a/src/main/scala/io/opentargets/etl/backend/evidence/Evidence.scala b/src/main/scala/io/opentargets/etl/backend/evidence/Evidence.scala
index 93c723d4..7f66a4e0 100644
--- a/src/main/scala/io/opentargets/etl/backend/evidence/Evidence.scala
+++ b/src/main/scala/io/opentargets/etl/backend/evidence/Evidence.scala
@@ -263,6 +263,8 @@ object Evidence extends LazyLogging {
       .withColumn(
         "evidenceDate",
         coalesce(
+          // To pick evidence date the highest priority is the studyStartDate, then publicationDate, releaseDate the lowest: 
+          col("studyStartDate"),
           col("publicationDate"),
           col("releaseDate")
         )