%0 Journal Article %T Association of serum 25-hydroxyvitamin D concentrations with sleep phenotypes in a German community sample %A Anja Willenberg %A Christian Sander %A Cornelia Enzenbach %A Elisabeth Kohls %A Ezgi Dogan-Sander %A Joachim Thiery %A J¨¹rgen Kratzsch %A Kerstin Wirkner %A Roland Mergl %A Ulrich Hegerl %A £¿nci Batmaz %J Archive of "PLoS ONE". %D 2019 %R 10.1371/journal.pone.0219318 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611612/