- Correspondence to Dr Sukhyun Ryu, Department of Preventive Medicine, Konyang University College of Medicine, Daejeon 35365, South Korea;
- Received March 18, 2021
- Revised April 14, 2021
- Accepted April 26, 2021
- First published June 4, 2021.
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.