Dr. Hermes Taylor-Weiner is a Whitaker Scholar at the Karolinska Institute who recently finished his graduate work at the University of California, San Diego. Stephen Morrissey, the interviewer, is the Managing Editor of the Journal. H. Taylor-Weiner and J. Graff Zivin. Medicine’s Wild West - Unlicensed Stem-Cell Clinics in the United States. N Engl J Med 2015;373:985-7.