The Bonn replication sample included patients with a DSM-IV diagnosis of major depression who were recruited from consecutive admissions to the Department of Psychiatry of the University of Bonn, Germany as described in (Rietschel et al., 2010). Of the 604 individuals described in this publication, only the 292 without a family history of an axis I disorder other than major depression were used in this analysis. Population-based controls were recruited as described in (Rietschel et al., 2010).