- Correspondence to Dr Qian Lu, Peking University School of Nursing, Beijing 100191, China;
- Received April 18, 2020
- Revision received June 14, 2020
- Accepted August 11, 2020
- First published September 11, 2020.
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.