Effects on hippocampal activity following novel 5-HT4 receptor agonism in unmedicated patients with depression: the RESTAND study. - de Cates AN; Gillespie AL; Scaife J; Martens MAG; Carson J; Godlewska BR; Howard W; Guru A; Cowen PJ; Harmer CJ; Murphy SE (Translational psychiatry, 2026)