Schrag, A; Martino, D; Apter, A; Ball, J; Bartolini, E; Benaroya-Milshtein, N; Buttiglione, M; ... EMTICS Collaborative Group; + view all Schrag, A; Martino, D; Apter, A; Ball, J; Bartolini, E; Benaroya-Milshtein, N; Buttiglione, M; Cardona, F; Creti, R; Efstratiou, A; Gariup, M; Georgitsi, M; Hedderly, T; Heyman, I; Margarit, I; Mir, P; Moll, N; Morer, A; Müller, N; Müller-Vahl, K; Münchau, A; Orefici, G; Plessen, KJ; Porcelli, C; Paschou, P; Rizzo, R; Roessner, V; Schwarz, MJ; Steinberg, T; Tagwerker Gloor, F; Tarnok, Z; Walitza, S; Dietrich, A; Hoekstra, PJ; EMTICS Collaborative Group; - view fewer (2019) European Multicentre Tics in Children Studies (EMTICS): protocol for two cohort studies to assess risk factors for tic onset and exacerbation in children and adolescents. European Child and Adolescent Psychiatry , 28 (1) pp. 91-109. 10.1007/s00787-018-1190-4.