1. Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China;
2. Department of Endocrinology, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China;
3. Department of Endocrinology, The First Hospital of Shijiazhuang, Shijiazhuang, Hebei, People’s Republic of China;
4. Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital, Shijiazhuang, Hebei, People’s Republic of China