We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSeasonal genetic influence on serum 25-hydroxyvitamin D levels: a twin study.AuthorsSnellman G; Melhus H; Gedeborg R; Olofsson S; Wolk A; Pedersen NL; Michaëlsson KPublicationPloS one, 2009, Vol 4, Issue 11, pe7747ISSN1932-6203Publication typearticleDOI10.1371/journal.pone.0007747