Frequency and clinical characterization of chronic urticaria in a tertiary care hospital. Revista Alergia México, [S. l.], v. 68, n. 2, p. 94–100, 2021. DOI: 10.29262/ram.v658i2.818. Disponível em: https://ojs.revistaalergia.mx/ojs/index.php/ram/article/view/818. Acesso em: 23 sep. 2026.