SGENE-plus, the genome-wide portion of the study, included 2,663 cases and 13,498 controls from eight European locations: England, Finland (Helsinki), Finland (Kuusamo), Germany (Bonn), Germany (Munich), Iceland, Italy and Scotland. Follow-up groups comprised 4,999 cases and 15,555 controls from twelve European locations: Denmark (Aarhus), Denmark (Copenhagen), Finland, Germany (Bonn), Germany (Munich), Hungary, the Netherlands, Norway, Russia, Spain (Santiago), Spain (Valencia) and Sweden. Cases were diagnosed with schizophrenia according to DSM-IV or ICD-10 criteria (see Supplementary Methods).
