- Correspondence to Dr Lin Guo, First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China;
- Accepted 29 April 2017
- Published online 9 August 2017.
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.