AU - Gadow KD, Sverd J, Sprafkin J, Nolan EE, Grossman S TI - LOng-term methylphenidate therapy in children with comorbid attention-deficit hyperactivity disorder and chronic multiple tic disorder PT - JOUR DP - 1999 TA - Archives of General Psychiatry pages = {330-336}, VI - 56 IP - 4 AID - 10.1001/archpsyc.56.4.330 [doi] 4100 - http://dx.doi.org/10.1001/archpsyc.56.4.330 SO - Archives of General Psychiatry April 1, 1999 56(4):330