pubmed:affiliation |
Lung Biology Center, Center for Occupational and Environmental Health, Cardiovascular Research Institute, and Medical Service, San Francisco General Hospital, University of California, San Francisco, CA, USA.
|
pubmed:publicationType |
Journal Article,
Clinical Trial,
Comparative Study,
Research Support, U.S. Gov't, P.H.S.,
Randomized Controlled Trial,
Research Support, Non-U.S. Gov't
|