- Correspondence to Dr Gary Tse, Department of Medicine and Therapeutics and Li Ka Shing Institute of Health Sciences, Faculty of Medicine, Chinese University of Hong Kong, Hong Kong, China;
- Received 16 October 2017
- Revised 10 November 2017
- Accepted 12 November 2017
- Published in print 1 January 2018.
- Published online 7 January 2018.
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