Are stimulants overprescribed? Treatment of ADHD in four US communities. - Jensen,P.S.; Kettle,L.; Roper,M.T.; Sloan,M.T.; Dulcan,M.K.; Hoven,C.; Bird,H.R.; Bauermeister,J.J.; Payne,J.D. (J Am Acad Child Adolesc Psychiat, 1999)