Palmer Lyle J, Silverman Eric S, Weiss Scott T, Drazen Jeffrey M
Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
Am J Respir Crit Care Med. 2002 Apr 1;165(7):861-6. doi: 10.1164/ajrccm.165.7.2109096.