Serum concentration of vitamin D in Alopecia areata - A hospital based observational study . International Journal of Biomedical Research, [S. l.], v. 12, n. 7, p. e5639, 2021. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/5639. Acesso em: 29 mar. 2026.