According to the Dyslexia Research Institute, up to 15 percent of Americans are affected by this neurological difference, resulting in language, perceptual and processing difficulties. The percentage of dyslexic doctors is difficult to measure, as many fear that disclosure could thwart professional development and compromise the trust of patients. Beryl Benacerraf, professor of obstetrics, gynecology and reproductive biology at Brigham and Women's Hospital, is quoted.