Routine Folic Acid and Vitamin B12 Supplementation in Hemodialysis Patients: A Cross‑Sectional Analysis of Achieved Serum Levels. Portuguese Kidney Journal, [S. l.], v. 40, n. 1, p. 20–24, 2026. DOI: 10.71749/pkj.128. Disponível em: https://pkj.spnefro.pt/index.php/journal/article/view/128.. Acesso em: 23 mar. 2026.