Berne & Levy physiology / editors, Bruce M. Koeppen, MD, PhD, Dean, Frank H. Netter MD School of Medicine, Quinnipiac University, Hamden, Connecticut, Bruce A. Stanton, PhD, Andrew C. Vail Professor, Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire; associate editors Julianne M. Hall, PhD, Professor of Medical sciences, Frank H. Netter, MD School of Medicine, Quinnipiac University, Hamden, Connecticut, Agnieszka Swiatecka-Urban, MD, Professor of Pediatrics, Division Head of Pediatric Nephrology, University of Virginia, Charlottesvile, Virginia.