Tourettes SyndromeNEJM 363:2332-2338, Kurlan,R., 2010
Tourette's SyndromeNEJM 345:1184-1192, Jankovic,J., 2001
Definitions and Classification of Tic DisordersArch Neurol 50:1013-1016, Fahn,S.,et al, 1993