1. Department of Hepatobiliary and Pancreatic Surgery, Fuyang People’s Hospital, Anhui Medical University , Fuyang , People’s Republic of China
2. Department of Hepatobiliary and Pancreatic Surgery, Fuyang People’s Hospital, Bengbu Medical College , Fuyang , People’s Republic of China
3. Department of Neurosurgery, Seventh Clinical College of China Medical University , People’s Republic of China
4. Department of Preventive Medicine, Medical School, Anhui University of Science and Technology , Huainan , People’s Republic of China