Reproductive Medicine, Anti-Aging Medicine, Longevity.
Founding Member, International Society for the Study of the Aging Male
International Society for Sexual Medicine and Asia Pacific Society for the Study of the Aging Male
American Academy of Family Physicians, 1980-1995
Member, American Society for Reproductive Medicine, 1990
American Medical Association, 1980-1990
American College for Advancement in Medicine, 1995-present
Holistic Medical Association, 2005-present