Friedlander Adam L, Fessler Michael B
Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado at Denver and Health Sciences Center, 4200 East Ninth Ave, Box C-272, Denver, CO 80262, USA.
Chest. 2006 Oct;130(4):1269-74. doi: 10.1378/chest.130.4.1269.