- Correspondence to Dr Ava Kwong, Department of Surgery, Queen Mary Hospital, Hong Kong 518031, China;
- Received June 25, 2018
- Revised February 1, 2019
- Accepted February 6, 2019
- First published April 19, 2019.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.