1. Endocrinology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.
2. Department of Geriatrics, The First Affiliated Hospital of Hebei North University Zhangjiakou, Hebei, China.
3. The First Clinical Medical College Southern Medical University, Guangzhou, Guangdong, China.
4. Hebei Provincial Hospital of Traditional Chinese Medicine, Shijiazhuang, Hebei, China.