1. Department of Geriatrics Ward 2 The First Hospital of Lanzhou University Lanzhou China
2. Department of Cardiology, Union Hospital, Tongji Medical College Huazhong University of Science and Technology Wuhan China
3. The First Clinical Medicine School of Lanzhou University Lanzhou China
4. Storr Liver Center, Westmead Institute for Medical Research University of Sydney and Westmead Hospital Sydney New South Wales Australia