- Correspondence to: Dr W C Holmes Center for Health Equity Research and Promotion, Philadelphia VA Medical Center; University of Pennsylvania School of Medicine, 733 Blockley Hall, 423 Guardian Drive, Philadelphia, PA 19104–6021, USA;
- Accepted July 2, 2006
- First published March 19, 2007.
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.