Working with the Health Care Team Ernest H. Rosenbaum, MD, Malin Dollinger, MD, Lenore Dollinger, RN, PhD, and Isadora Rosenbaum, MA Adapted for the Canadian edition by Richard Hasselback, MD After you've been diagnosed with cancer, you enter a world that is probably unfamiliar to you. The cancer treatment system is large and complex. Many different kinds of health care facilities and institutions are involved, and the system is populated by a bewildering array of professionals.