John D Kelly1. 1. J. D. Kelly IV, Professor of Clinical Orthopaedic Surgery, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA A note from the Editor-in-Chief: I am pleased to present the next installment of "Your Best Life," a quarterly column written by John D. Kelly, IV MD. Dr. Kelly is a Professor of Clinical Orthopaedic Surgery at the University of Pennsylvania. His column explores the many ways that busy professionals-surgeons and scientists-might find peace, happiness, and balance both at work and in their personal lives.