1. Department of Clinical Nutrition, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
2. Department of Nursing, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
3. Department of Internal Medicine, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
4. Department of Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China