Open-label and non-randomized study of therapeutic effect of amantadine monotherapy and concomitant amantadine with salvia miltiorrhiza compound or selegiline on early Parkinson's disease是什么意思 Open-label and non-randomized study of therapeutic effect of amantadine monotherapy and concomitant amantadine with salvia miltiorrhiza compound or selegiline on early Parkinson's disease怎么读