diff --git a/src/app/core/models/study.ts b/src/app/core/models/study.ts
index c433458..c6bfdd3 100644
--- a/src/app/core/models/study.ts
+++ b/src/app/core/models/study.ts
@@ -30,6 +30,7 @@ export interface Study {
   agreedToCc0: boolean;
   diseaseTrait: ReportedTrait;
   efoTraits: EfoTrait[];
+  backgroundEfoTraits: EfoTrait[];
   sumstats_flag: boolean;
   pooled_flag: boolean;
   gxe_flag: boolean;