Weyer Patrick, Cummings Oscar W, Knox Kenneth S
Department of Medicine, Pulmonary Division, Indiana University School of Medicine, 1481 West Tenth St, 111P-IU, Indianapolis, IN 46202, USA.
Chest. 2005 Oct;128(4):3076-7, 3078-9. doi: 10.1378/chest.128.4.3076.