- Correspondence to Dr John H Davidson, Division of General Internal Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA;
- Received August 16, 2013
- Revised January 7, 2014
- Accepted January 9, 2014
- First published January 24, 2014.
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.