text_1: 一些 研究 提示 DPP - 4 抑制剂 与 患 胰腺炎 ( NEJM JW Gen Med May 1 2017 and Diabetes Care 2017 ; 40 : 164 and 284 ) 和 胰腺癌 的 超额 危险度 相关 .
  
text_2: some studies have suggested that dipeptidyl peptidase ( DPP ) -4 inhibitors are associated with excess risks for pancreatitis ( NEJM JW Gen Med May 1 2017 and Diabetes Care 2017 ; 40 : 164 and 284 ) and pancreatic cancer .
  