LRRK2 protective haplotype and full sequencing study in REM sleep behavior disorder per Ouled Amar Bencheikh, B, Ruskey, J, Arnulf, I, Dauvilliers, Y, Monaca, C, Cock, D, Gagnon, J, Spiegelman, D, Hu, M, Högl, B, Stefani, A, Ferini-Strambi, L, Plazzi, G, Antelmi, E, Young, P, Heidbreder, A, Mollenhauer, B, Sixel-Döring, F, Trenkwalder, C, Oertel, W, Montplaisir, J, Postuma, R, Rouleau, G, Gan-Or, Z