The times of the following Surgery Lectures have been changed to 5:00-6:00 p.m. (formerly 5:30-6:30): June 12: "CPAP, PEEP, IMV, and Other ABCs of Ventilator Management" Jeffrey R. Hammersley, M.D. June 19: "Toward a New Mammalian Genetics" Andrea L. Nestor, Ph.D.