Relationship Between Serum Vitamin D Levels  and Anxiety Severity in Elderly Patients at the Internal Medicinie and Psychiatry Clinic of RSUP Prof. dr. I.G.N.G Ngoerah Denpasar. MEDICINUS, Indonesia, v. 39, n. 2, p. 7–15, 2026. DOI: 10.56951/agbfxp34. Disponível em: https://medicinus.co/journal/article/view/medicinus-vol39-no2-7-15. Acesso em: 4 feb. 2026.