Age, gender, geographic and clinical differences for gallstones in China: a nationwide study - Song, Yang; Ma, Yuan; Xie, Fu-Cun; Jin, Cheng; Yang, Xiao-Bo; Yang, Xu; Long, Jun-Yu; Wang, Dong-Xu; Sang, Xin-Ting; Li, Li-Ming; Zhao, Hai-Tao; Ning, Yi (Annals of Translational Medicine; Vol 10, No 13 (July 15, 2022): Annals of Translational Medicine, 2022)