An inherited duplication at the gene p21 Protein-Activated Kinase 7 (PAK7) is a risk factor for psychosis. by Morris, D, Pearson, R, Cormican, P, Kenny, E, O'Dushlaine, C, Perreault, L, Giannoulatou, E, Tropea, D, Maher, B, Wormley, B, Kelleher, E, Fahey, C, Molinos, I, Bellini, S, Pirinen, M, Strange, A, Freeman, C, Thiselton, D, Elves, R, Regan, R, Ennis, S, Dinan, T, McDonald, C, Murphy, K, O'Callaghan, E