1. Department of Graduate School, Tianjin Medical University, Heping District, China (H. Shi).
2. Department of Rheumatology and Immunology, Kailuan General Hospital, Tangshan, Hebei Province, China (H. Shi, L.C., R.S., H. Song, J.W., P.Y.).
3. Department of Radiology, Beijing Friendship Hospital, Capital Medical University, China (Y.H., X.L., Z.W.).
4. Department of Cardiology, Kailuan General Hospital, Tangshan, Hebei Province, China (S.W., S.C.).
5. School of Public Health, North China University of Science and Technology, Tangshan, Hebei (L.Y.).
6. Department of Cardiology, Tianjin Medical University General Hospital, Heping District, China (Q.Y., Y.G.).