pubmed:affiliation |
Section of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts 02118, USA. modonn@bu.edu
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Randomized Controlled Trial,
Research Support, N.I.H., Extramural
|