- Correspondence to Xiang Wei, Division of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; and Dr Shiyi Cao, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China;
- Received December 18, 2018
- Revised February 20, 2019
- Accepted February 21, 2019
- First published April 1, 2019.
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