- Correspondence to Weng Ian Che, Clinical epidemiology division, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Stockholm, Sweden;
- Received January 14, 2021
- Accepted May 31, 2021
- First published June 15, 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.