Cognition, psychosis risk and metabolic measures in two adolescent birth cohorts – CORRIGENDUM. Issue 15 (30th August 2018) - Ramsay, Hugh; Barnett, Jennifer H.; Murray, Graham K.; Miettunen, Jouko; Mäki, Pirjo; Järvelin, Marjo-Riitta; Smith, George Davey; Ala-Korpela, Mika; Veijola, Juha