1. Department of Abdominal Tumor Surgery, Qingdao Central Hospital, Qingdao, Shandong, 266042, China
2. Department of Traumatology and Orthopedics, Bone Disease and Bone Tumor, Emergency Surgery, Qingdao Central Hospital, Qingdao, Shandong, 266042, China
3. Qingdao Central Hospital Health Management Center, Qingdao, Shandong, 266042, China