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Genetic Risk and Outcome of Psychosis (GROUP), a multi-site longitudinal cohort study focused on gene-environment interaction: objectives, sample characteristics, recruitment and assessment methods.
Korver N, Quee PJ, Boos HB, Simons CJ, de Haan L; GROUP investigators. Korver N, et al. Int J Methods Psychiatr Res. 2012 Sep;21(3):205-21. doi: 10.1002/mpr.1352. Epub 2012 Mar 15. Int J Methods Psychiatr Res. 2012. PMID: 22419500 Free PMC article. Clinical Trial.