1. Department of General Surgery, Second Affiliated Hospital of Nanchang University, Nanchang, 330006 Jiangxi Province, China
2. Department of General Surgery, Yongxin County People’s Hospital, Ji’an, 343000 Jiangxi Province, China
3. Department of Ultrasound, The Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, 330006 Jiangxi Province, China