Plasma homocysteine and l-dopa metabolism in patients with Parkinson disease.

tients with Parkinson Disease, Fabio Blandini, Roberto Fancellu, Emilia Martignoni, Anna Mangiagalli, Claudio Pacchetti, Alberta Samuele, and Giuseppe Nappi ( Laboratory of Functional Neurochemistry, 2 Center for Parkinson Disease and Movement Disorders, Neurological Institute “C. Mondino”, 27100 Pavia, Italy; 3 University of Insubria, 21100 Varese, Italy; 4 University of Piemonte Orientale “Amedeo Avogadro”, 28100 Novara, Italy; 5 Institute of Nervous and Mental Diseases, University of Rome “La Sapienza”, 00185 Rome, Italy; * address correspondence to this author at: Laboratory of Functional Neurochemistry, Neurological Institute “C. Mondino”, Via Palestro, 3 27100 Pavia, Italy; fax 39-0382-380286, e-mail [email protected])