pubmed:affiliation |
Division of General Internal Medicine and Health Services Research, Department of Medicine, UCLA, Los Angeles, California 90095, USA. wcunningham@mednet.ucla.edu
|
pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
|