Relationship between the appearance of symptoms and the level of nigrostriatal degeneration in a progressive 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-lesioned macaque model of Parkinson's disease. - Bezard,E.; Dovero,S.; Prunier,C.; Ravenscroft,P.; Chalon,S.; Guilloteau,D.; Crossman,AR.; Bioulac,B.; Brotchie,JM.; Gross,CE. (J Neurosci, 2001)