pubmed:affiliation |
Division of General Internal Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6021, USA. carmen.guerra@uphs.upenn.edu
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
|