Treatments of Parkinson DiseaseArch Neurol 60:1680-1684, Shults,C.W., 2003
COMT Inhibition with Tolcapone Reduces the"Wearing Off"Phenomenon & Levodopa Requirements in Fluctuating Parkinsonisn PtsJNNP 63:421-428, Baas,H.,et al, 1997