Yang MW, Fu XL, Jiang YS, Chen XJ, Tao LY, Yang JY, Huo YM, Liu W, Zhang JF, Liu PF, Liu Q, Hua R, Zhang ZG, Sun YW, Liu DJ. Clinical significance of programmed death 1/programmed death ligand 1 pathway in gastric neuroendocrine carcinomas. World J Gastroenterol 2019; 25(14): 1684-1696 [PMID: 31011254 DOI: 10.3748/wjg.v25.i14.1684]