Jo Ann Hattner, MPH RD, specializes in digestive health and has over thirty years experience practicing nutrition in the San Francisco Bay area. As a dietitian at Stanford and in private practice, she has counseled parents about their infants and children, adolescents, men and women, and older adults about a variety of health and nutrition issues. She teaches nutrition to medical students at Stanford University School of Medicine. She is a regular guest speaker at national meetings of dietitians, physicians, and other professionals and has served as spokesperson for the American Dietetic Association. Susan Anderes, MLIS, is a research librarian and web developer. She maintains nutrition course websites at Stanford Medical School and works as a medical librarian.