Spisak, Ladislav, Marie Karlikova, Sarka Svobodova, Lemis Kravecz, Jana Zehleova, Ondrej Topolcan, and Vaclav Simanek. 2023. “VITAMIN D: : A PILOT STUDY OF THE CZECH POPULATION”. Journal of the ASEAN Federation of Endocrine Societies 38 (S3):3. https://asean-endocrinejournal.org/index.php/JAFES/article/view/2945.