Wolf, Eva
Utech, Markus
Stehle, Peter
Büsing, Martin
Helfrich, Hans-Peter
Stoffel-Wagner, Birgit
Egert, Sarah
Alteheld, Birgit
Riege, Raute
Knapp, Annette
Ellinger, Sabine https://orcid.org/0000-0002-9988-9406
Funding for this research was provided by:
The provision of the vitamin D-containing supplement and the vitamin D free placebo was partly financed by Fresenius-Kabi, Bad Homburg, Germany.