1. Department of Geriatric Cardiology, Hebei General Hospital, Shijiazhuang, China
2. Department of Internal Medicine, Hebei General Hospital, Shijiazhuang, China
3. Department of Cardiology, The Third Hospital of Shijiazhuang City Affiliated to Hebei Medical University, Shijiazhuang, China
4. Department of Physical Examination Center, Hebei General Hospital, Shijiazhuang, China
5. Department of Cardiology, Hebei General Hospital, Shijiazhuang, China