Transdiagnostic dimensions of psychopathology at first episode psychosis: findings from the multinational EU-GEI study - Quattrone, Diego; Forti, Marta Di; Gayer-Anderson, Charlotte; Ferraro, Laura; Jongsma, Hannah E; Tripoli, Giada; Cascia, Caterina La; Barbera, Daniele La; Tarricone, Ilaria; Menezes, Paulo Rossi; Del-Ben, Cristina Marta (Psychological Medicine, 2019)