Sichuan Provincial Pancreatitis Center;
Department of Integrated Traditional Chinese Medicine and Western Medicine;
West China Hospital;
Sichuan University;
Department of Pancreatic Surgery;
West China Hospital;
Sichuan University;
NIHR Liverpool Pancreas Biomedical Research Unit;
Royal Liverpool University Hospital;
Pancreaticoduodenectomy; Pylorus; preservingSubtotal; stomach; preserving; pancreaticoduodenectomy; Delayed; gastric; emptying; Pancreatic; surgery; Metaanalysis;