- Correspondence to Professor Ruxiang Xu, PLA Army General Hospital, Beijing, 100700, China; and Dr Gengsheng Mao, General Hospital of Chinese People’s Armed Police Forces, Beijing, 100039, China;
- Received March 22, 2018
- Revised June 6, 2018
- Accepted June 6, 2018
- First published June 22, 2018.
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.