American Journal of Respiratory and Critical Care Medicine Vol 179. pp. 743-758, (2009)
Robert A. Fowler1, Neill K. J. Adhikari1, Damon C. Scales1, Warren L. Lee1 and Gordon D. Rubenfeld1
1 Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
Go to AJRCCM's site here.