EuroInf: a multicenter comparative observational study of apomorphine and levodopa infusion in Parkinson's disease - Martinez-Martin, P; Reddy, P; Katzenschlager, R; Antonini, A; Todorova, A; Odin, P; Henriksen, T; Martin, A; Calandrella, D; Rizos, A; Bryndum, N; Glad, A; et al. (Movement disorders : official journal of the Movement Disorder Society, 2015)