The burden and trend of gastric cancer and possible risk factors in five Asian countries from 1990 to 2019 oleh Fei-Long Ning, Jun Lyu, Jun-Peng Pei, Wan-Jie Gu, Nan-Nan Zhang, Shi-Yi Cao, Yong-Ji Zeng, Masanobu Abe, Kazuhiro Nishiyama, Chun-Dong Zhang