EPO and Behcet disease: We pooled data from our two parallel identical trials in treatment-resistant depression and BD for the present analysis because of the similar abnormalities in neural activity during WM and spatial memory encoding across unipolar and BDs (Miskowiak and Petersen, 2019) and similar effects of EPO on cognitive function and neural activity across these groups (Miskowiak et al., 2016a, b; Ott et al., 2016).