1. Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, P.R. of China,
2. Physical Examination Center, Beijing Chao-yang Hospital, Capital Medical University, Beijing, China,
3. Department of Endocrinology, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing, P.R. of China, and
4. The First People’s Hospital of Nanning Affiliated to the Guangxi Medical University, Nanning, P.R. of China