Timothy McCall is a board-certified specialist in internal medicine, the medical editor of Yoga Journal, and the author of two books, Yoga as Medicine and Examining Your Doctor. He completed Yoga as Medicine while he was a Scholar-in-Residence at the Kripalu Center for Yoga and Health in Lenox, Massachusetts. His current focus involves investigating the therapeutic aspects of yoga, as well as its scientific explanations. McCall can be found on the web at www.DrMcCall.com.