Structure and clinical correlates of obsessive–compulsive symptoms in a large sample of children and adolescents: a factor analytic study across five nations

D. R.M.A. Højgaard, E. L. Mortensen, T. Ivarsson, K. Hybel, G. Skarphedinsson, J. B. Nissen, R. Valderhaug, K. Dahl, B. Weidle, N. C. Torp, M. Grados, A. B. Lewin, K. H. Melin, E. A. Storch, L. H. Wolters, T. K. Murphy, E. J.S. Sonuga-Barke, P. H. Thomsen