Transplant surgeon Transplant surgeon Mark Laftavi, MD, discusses pancreas transplants and the increasing number of "living donor" kidney transplants Mark Laftavi, MD, discusses pancreas transplants and the increasing number of "living donor" kidney transplants. Stroke neurologist. Stroke neurologist Hesham Masoud, MD, and neurological nurse Joshua Onyan field questions to mark Stroke Awareness Month Hesham Masoud, MD, and neurological nurse Joshua Onyan field questions to mark Stroke Awareness Month. .