About the author

By Matthew N. Levy, MD, Professor Emeritus, Physiology & Biomedical Engineering, Case Western Reserve University, Cleveland, OH; Bruce M. Koeppen, MD, PhD, Dean, Frank H. Netter MD School of Medicine, Quinnipiac University, Hamden, Connecticut and Bruce A. Stanton, PhD, Andrew C. Vail Professor, Director of the Lung Biology Center, Department of Physiology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire