- Correspondence to Dr Yong Liu, Department of Cardiology, Guangdong Provincial Key Laboratory of Coronary Heart Disease, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China;
- Received January 24, 2020
- Revised May 10, 2020
- Accepted May 17, 2020
- First published June 24, 2020.
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