- Correspondence to Professor Ying Qing Feng, Cardiology, Guangdong Cardiovascular Institute, Hypertension Research Laboratory, Guangdong Provincial People’s Hospital, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangzhou 510080, China;
- Received August 8, 2019
- Revised November 19, 2019
- Accepted November 24, 2019
- First published December 5, 2019.
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