Alan R. Greene, M.D., is a pediatrician in practice with A.B. C.Pediatrics in San Mateo, California. He is a clinical instructor in the department of pediatrics at Stanford University school of Medicine and vice chairman of the department of pediatrics at Mills-Peninsula Hospitals. He is also the popular on-line author of "Dr. Greene's HouseCalls" (http: //wwww.drgreene.com), where he answers parents' concerns about children's health topics.
