1. Department of Endocrinology, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
2. Department of Clinical Nutrition, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
3. Department of Neurosurgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China