The doctors are on call, and not only today, but also 24/7 since their retirement from full-time medical practice. Under the leadership of Dr. Donald B. Doty and his wife, Cheryl, these physicians make up a Salt Lake City-based team of 40 volunteer physicians and mental health professionals who work as medical advisers to the ever-increasing numbers of missionaries serving in the 405 worldwide missions of The Church of Jesus Christ of Latter-day Saints. Numerous LDS physicians donate full-time service to respond to the health needs of currently serving missionaries, but additional physicians, both retired and still employed, donate time to reviewing missionary applications and screening medical issues.