Kalassian K G, Doyle R, Kao P, Ruoss S, Raffin T A
Division of Pulmonary and Critical Care Medicine, Stanford University Medical Center, California 94305-5236, USA.
Am J Respir Crit Care Med. 1997 Apr;155(4):1183-6. doi: 10.1164/ajrccm.155.4.9105053.