diff --git a/IRaCIS.Core.Application/Service/Reading/ClinicalDataSetService.cs b/IRaCIS.Core.Application/Service/Reading/ClinicalDataSetService.cs
index edb4f6b54..169e821ad 100644
--- a/IRaCIS.Core.Application/Service/Reading/ClinicalDataSetService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ClinicalDataSetService.cs
@@ -105,6 +105,7 @@ namespace IRaCIS.Application.Services
         /// <param name="inDto"></param>
         /// <returns></returns>
         [HttpPost]
+        [UnitOfWork]
         public async Task<List<ClinicalDataTrialSetView>> GetTrialClinicalDataTrialSetList(GetTrialClinicalDataTrialIndto inDto)
         {
             await this.AddTrialClinicalDataTrialSet(inDto.TrialId);