Association between vitamin b(12) levels and melancholic depressive symptoms: a Finnish population-based study
Seppala, Jussi; Koponen, Hannu; Kautiainen, Hannu; Eriksson, Johan G.; Kampman, Olli; Leiviska, Jaana; Mannisto, Satu; Mantyselka, Pekka; Oksa, Heikki; Ovaskainen, Yrj; Viikki, Merja; Vanhala, Mauno; Seppala, Jussi (2013-07-18)