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von Känel, Roland; Fardad, Nasser; Steurer, Nadine; Horak, Nicole; Hindermann, Esther; Fischer, Franz; Gessler, Katharina (2015). Vitamin D Deficiency and Depressive Symptomatology in Psychiatric Patients Hospitalized with a Current Depressive Episode: A Factor Analytic Study. PLoS ONE, 10(9), e0138550. Public Library of Science 10.1371/journal.pone.0138550
