[1] Sichuan Univ, Dept Gastrointestinal Surg, West China Hosp, Chengdu, Sichuan, Peoples R China
[2] Sichuan Univ, West China Hosp, Dept Endocrinol & Metab, Chengdu, Sichuan, Peoples R China
[3] Sichuan Univ, West China Hosp, Gastrointestinal Tract Reconstruct & Metab Surg A, Chengdu, Sichuan, Peoples R China