Swain JE, Scahill L, Lombroso PJ, King RA, Leckman JF. "Tourette syndrome and tic disorders: a decade of progress". J Am Acad Child Adolesc Psychiatry. 2007 Aug; 46(8):947–68 doi:10.1097/chi.0b013e318068fbccPMID17667475
Swain JE, Scahill L, Lombroso PJ, King RA, Leckman JF. "Tourette syndrome and tic disorders: a decade of progress". J Am Acad Child Adolesc Psychiatry. 2007 Aug; 46(8):947–68 doi:10.1097/chi.0b013e318068fbccPMID17667475