1. Department of Cardiology, Xijing Hospital, Fourth Military Medical University, 127 West Changle Road, Xi’an 710032, China
2. Department of Cardiology, Hainan Branch of PLA General Hospital, Sanya 572013, China
3. Department of Geriatrics, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
4. Center for Translational Medicine, Temple University, Philadelphia, PA 19140, USA
5. State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi’an 710032, China