Quattrone, D; Ferraro, L; Tripoli, G; La Cascia, C; Quigley, H; Quattrone, A; Jongsma, HE; ... Di Forti, M; + view all Quattrone, D; Ferraro, L; Tripoli, G; La Cascia, C; Quigley, H; Quattrone, A; Jongsma, HE; Del Peschio, S; Gatto, G; EU-GEI group; Gayer-Anderson, C; Jones, PB; Kirkbride, JB; La Barbera, D; Tarricone, I; Berardi, D; Tosato, S; Lasalvia, A; Szöke, A; Arango, C; Bernardo, M; Bobes, J; Del Ben, CM; Menezes, PR; Llorca, P-M; Santos, JL; Sanjuán, J; Tortelli, A; Velthorst, E; De Haan, L; Rutten, BPF; Lynskey, MT; Freeman, TP; Sham, PC; Cardno, AG; Vassos, E; van Os, J; Morgan, C; Reininghaus, U; Lewis, CM; Murray, RM; Di Forti, M; - view fewer (2021) Daily use of high-potency cannabis is associated with more positive symptoms in first-episode psychosis patients: the EU-GEI case–control study. Psychological Medicine , 51 (8) pp. 1329-1337. 10.1017/S0033291720000082.