David J. Leffell, MD, was born in 1956 in Montreal, Canada and educated at Yale. Leffell is an internationally recognized expert in skin cancer and the Mohs technique, plastic reconstruction, and new technologies in dermatology. He specializes in the diagnosis, treatment, and prevention of melanoma and nonmelanoma skin cancer. He is the David Paige Smith Professor of Dermatology and Surgery, chief of Dermatologic Surgery and Cutaneous Oncology, and former Deputy Dean for Clinical Affairs at Yale University School of Medicine [1]. In January 2012, Dr. Leffell stepped down as chief executive officer of the Yale Medical Group [2], after 15 years of leadership of the organization. He serves on the board of Validus Pharmaceuticals and is a trustee of The Hopkins School, one of America's oldest