JOHN S. RODMAN, M.D., is Associate Clinical Professor of Medicine at Cornell University School of Medicine in New York City, and a member of the attending staffs at New York Hospital and Lenox Hill Hospital. CYNTHIA SEIDMAN, M.S., R.D., is Director of Dietary Services at The Rockefeller University Hospital in New York City. RORY JONES, an award-winning writer and TV producer, has done extensive work on health and medical topics.