[1] Tulane Univ, Sch Med, New Orleans, LA 70112 USA
[2] Cent S Univ, Xiangya Hosp, Dept Gen Surg, Changsha, Hunan, Peoples R China
[3] Tulane Sch Med, Dept Surg, New Orleans, LA USA
[4] Tulane Univ, Sch Med, Dept Surg, Div Endocrine & Oncol Surg, New Orleans, LA 70112 USA