pubmed:affiliation |
Department of Medicine, University of Vermont, Vermont Lung Center, Burlington, VT 05405, USA. hans.haverkamp@uvm.edu
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Randomized Controlled Trial,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
|