diff --git a/app/models/entities/Evidence.scala b/app/models/entities/Evidence.scala
index f19af86e..44db29e5 100644
--- a/app/models/entities/Evidence.scala
+++ b/app/models/entities/Evidence.scala
@@ -477,9 +477,15 @@ object Evidence {
       Field(
         "literature",
         OptionType(ListType(StringType)),
-        description = None,
+        description = Some("list of pub med publications ids"),
         resolve = js => (js.value \ "literature").asOpt[Seq[String]]
       ),
+      Field(
+        "pubMedCentralIds",
+        OptionType(ListType(StringType)),
+        description = Some("list of central pub med publications ids"),
+        resolve = js => (js.value \ "pmcIds").asOpt[Seq[String]]
+      ),
       Field(
         "studyCases",
         OptionType(LongType),