b'Dr. Alison Loren is an associate professor of medicine at the Hospital of the University of Pennsylvania. Stephen Morrissey, the interviewer, is the Executive Managing Editor of the Journal. A.W. Loren. Harder to Treat Than Leukemia \\u2014 Opioid Use Disorder in Survivors of Cancer. N Engl J Med 2018;379:2485-2487.'