A pioneer in his field, Dr. Dosoretz led the growth of 21st Century Oncology into a global oncology network now the largest provider of radiation therapy and the second largest group of urologists in the U.S. The Company operates 182 treatment centers, including 146 located in 17 U.S. states and 36 centers in 7 Latin American countries. 21st Century Oncology has a dominant market position in most its practice locations. Dr. Dosoretz earned his medical degree from the University of Buenos Aires School of Medicine, graduating with the highest honors. He trained in radiation oncology at Massachusetts General Hospital and Harvard Medical School, where he served as Chief Resident of the department. Dr. Dosoretz is an Assistant Professor of Radiation Medicine at Harvard Medical School and a visiting Professor at Duke University School of Medicine. He is a Research Fellow of the American Cancer Society. Dr. Dosoretz is a Fellow of the American College of Radiology (ACR) and the American College of Radiation Oncology (ACRO).