VALIDATION OF THE LC-MS/MS METHOD FOR 25-HYDROXYVITAMIN D DETERMINATION IN CHILDREN’S SERUM ACCORDING TO VDSP STANDARDS. Environment & Health, [S. l.], v. 119, n. 2, 2026. DOI: 10.32402/. Disponível em: https://dovkil-zdorov.kiev.ua/journal/article/view/1247. Acesso em: 7 jul. 2026.