9Parkinson Study Group. Effects of tocopherol and deprenyl on the progression of disability in early Parkinson' s disease. N Engl J Med, 1993, 328 : 176-183.
10Hauser RA, Lew MF, Hurtig HI, et al. Long-term outcome of early versus delayed rasagiline treatment in early Parkinson' s disease. Mov Disord, 2008, 24:562-571.