- Correspondence to Prof. Feng Cheng, Research Centre for Public Health, School of Medicine, Tsinghua University, Beijing 100084, China; and Dr. Lei Zhang, Central Clinical School Monash University Faculty of Medicine, Nursing and Health Sciences Clayton Victoria Australia ;
- Received September 19, 2017
- Revised March 26, 2018
- Accepted April 21, 2018
- First published May 24, 2018.
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