1. Department of Anatomy, School of Basic Medicine, Guizhou Medical University, Guiyang 550009, Guizhou, China
2. Department of Physiology, School of Basic Medicine, Guizhou Medical University, Guiyang 550009, Guizhou, China
3. Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang 550009, Guizhou, China