Dr. Bruce Chabner is a professor of medicine at Harvard Medical School and director of clinical research at the MGH Cancer Center at Massachusetts General Hospital. Stephen Morrissey, the interviewer, is the Managing Editor of the Journal. M.L. Metzger, A. Billett, and M.P. Link. The Impact of Drug Shortages on Children with Cancer - The Example of Mechlorethamine. N Engl J Med 2012;