Dopamine transporter occupancies in the human brain induced by therapeutic doses of oral methylphenidate. - Volkow,N.D.; Wang,GJ.; Fowler,J.S.; Logan,J.; Gerasimov,M.; Maynard,L.; Ding,YS.; Gately,S.J.; Gifford,A.; Franceschi,D. (Am J Psychiat, 1998)