1 Department of Cardiology, Xianyang Central Hospital, Xianyang, Shaanxi 712000, China.
2 Department of Cardiology, Gansu Provincial Hospital, Lanzhou, Gansu 730000, China.
3 Department of Cardiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai 200000, China.
4 Critical Care and Sleep Division, Tufts Medical Center, Boston, MA 02111, USA.
5 Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin International Joint Research and Development Centre of Ophthalmology and Vision Science, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin 300384, China.