The association of ABO blood group and rh factor with recurrent aphthous ulceration . Annals of Medical Research, [S. l.], v. 25, n. 4, p. 0540–0544, 2021. Disponível em: http://annalsmedres.org/index.php/aomr/article/view/1160. Acesso em: 19 apr. 2025.