Adult Tics in Gilles de la Tourett's Syndrome:Description and Risk Factors
Neurol 42:784-788, Goetz,C.G.,et al, 1992
A Rating Scale for Gilles de la Tourette's Syndrome:Description, Reliability, & Validity Data
Neurol 37:1542-1544, Goetz,C.G.,et al, 1987