- Correspondence to Dr Gary Tse, Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China; and Professor Martin C S Wong, JC School of Public Health and Primary Care The Chinese University of Hong Kong Hong Kong China ;
- Received 14 November 2017
- Revised 19 February 2018
- Accepted 21 February 2018
- Published online 6 March 2018.
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