- Correspondence to Dr Kaoruko Shimizu, First Department of Medicine, Hokkaido University, School of Medicine, Sapporo 060-8638, Japan;
- Received April 25, 2019
- Revised October 31, 2019
- Accepted November 17, 2019
- First published January 2, 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.