- Correspondence to Dr James Yiin, Division of Surveillance, Hazard Evaluations, and Field Studies, National Institute for Occupational Safety and Health, Cincinnati, OH 45226, USA;
- Received May 16, 2019
- Revised November 13, 2019
- Accepted December 8, 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.