Allen J. Dozor, M.D., is professor of pediatrics and clinical public health, chief of the Division of Pulmonology, Allergy and Sleep Medicine, director of the Children’s Environmental Health Center of the Hudson Valley, director of the Armond V. Mascia, M.D. Cystic Fibrosis Center and associate physician-in-chief at Maria Fareri Children’s Hospital at Westchester Medical Center. He divides his time between patient care, teaching and research. He is a graduate of the University of Pennsylvania, the Pennsylvania State University and completed his residency at St. Vincent’s Hospital and Medical Center in New York, N.Y. and a fellowship at Children’s Hospital, Boston, Mass