Van Mulder, TJS; de Koeijer, M; Theeten, H; Willems, D; Van Damme, P; Demolder, M; De Meyer, G; Reetz, K; Dogan, I; Hilgers, RD; Giunti, P; Mariotti, C; Durr, A; Boesch, S; Klopstock, T; Javier Rodriguez de Rivera, F; Schols, L; Klockgether, T; Buerk, K; Rai, M; Pandolfo, M; Schulz, JB; EFACTS Study Grp