Boord J B, Graber A L, Christman J W, Powers A C
Department of Medicine, Vanderbilt University Medical Center, Tennessee Valley Veterans Affairs Medical Center, Nashville, Tennessee 37232, USA.
Am J Respir Crit Care Med. 2001 Nov 15;164(10 Pt 1):1763-7. doi: 10.1164/ajrccm.164.10.2103068.