- Correspondence to Dr Adrián V Hernández, Health Outcomes and Clinical Epidemiology, Department of Quantitative Health Sciences/JJN3-01, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH 44195, USA;
- Accepted August 15, 2011
- First published September 13, 2011.
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.