- Correspondence to Dr Steven P Cohen, Departments of Anesthesiology and Critical Care Medicine; Neurology; and Physical Medicine & Rehabilitation, Johns Hopkins School of Medicine, Baltimore, MD 21205, USA;
- Received October 7, 2018
- Accepted October 10, 2018
- First published December 19, 2018.
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.