Gary L. Schwartz, M.D., is the head of the hypertension section within the Division of Nephrology & Hypertension in the Department of Internal Medicine at Mayo Clinic in Rochester, Minn. In his 40-plus years of studying, researching, and treating people with high blood pressure, Dr. Schwartz has authored and reviewed numerous scientific papers and book chapters and has lectured around the world on topics related to blood pressure.