pubmed:affiliation |
Department of Medicine, Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine, University of California at Los Angeles, CA 90095, USA. johnchang@mednet.ucla.edu
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.,
Review,
Multicenter Study
|