1. Department of Medicine, Division of Traditional Chinese Medicine, Tai'an Hospital of Traditional Chinese Medicine, Tai'an, China.
2. Department of Medicine, Division of Geriatrics, First People's Hospital of Yunnan Province, Kunming, China.
3. Department of Medicine, Division of Endocrinology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China.
4. Department of Medicine, Division of Endocrinology, Qilu Hospital of Shandong University, Shandong University, Jinan, China.