A R, M.; KM, V. G.; CHANDRA, J.; BM, R. A cross-sectional observational study of serum parathyroid hormone levels and its relation with severity and duration of heart failure. International Journal of Health and Clinical Research, [S. l.], v. 4, n. 3, p. 123–126, 2021. Disponível em: https://www.ijhcr.com/index.php/ijhcr/article/view/893. Acesso em: 25 feb. 2026.