- Correspondence to Professor Ludwig Kappos, Departments of Medicine, Clinical Research, Biomedicine and Biomedical Engineering, University Hospital, Basel 4031, Switzerland;
- Received February 25, 2015
- Revised April 30, 2015
- Accepted May 13, 2015
- First published June 25, 2015.
This web only file has been produced by the BMJ Publishing Group from an electronic file supplied by the author(s) and has not been edited for content.
- Data supplement 1 - Online supplement