
Keywords: در هر پروتکل مجموعه; Droxidopa; Parkinson's disease; Motor fuction; Add-on; Norepinnehrine; CGI; Clinical Global Impression rating score; FAS; full analysis set; ITT; intent-to-treat; l-DOPA; Levodopa; l-DOPS; l-threo-3,4-dihydroxyphenylserine; NE; norepinnehrine; PD; Parki