In the follow-up study of rs1344706 association with schizophrenia, samples from nine locations (after quality control)—China (460 cases, 466 controls), Denmark/Aarhus (236 cases, 500 controls), Denmark/Copenhagen (513 cases, 1338 controls), Germany/Bonn (275 cases, 510 controls), Germany/Munich (178 cases, 320 controls), Hungary (264 cases, 223 controls), Norway (201 cases, 357 controls), Russia (483 cases, 487 controls) and Sweden (255 cases, 292 controls)—were included. The European samples in this set originated from ‘follow-up set 2’ of our primary GWA study,3 although some samples that were used in the original ZNF804A study4 or that lacked sufficient DNA for typing were excluded. In addition, 205 bipolar samples from Norway were part of the psychosis analysis.
