Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Schrag, Anette; Martino, Davide; Apter, Alan; Ball, Juliane; et al; Müller, Norbert; Roessner, Veit; Schwarz, Markus J; Tagwerker Gloor, Friederike; Walitza, Susanne (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 & Adolescent Psychiatry, 28(1):91-109.