Characterization of Maxillary Sinus in Patients with Facial Pain using Ultrasound. Global Journal of Medical Research, [S. l.], v. 13, n. 13, p. 3–6, 2013. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/. Acesso em: 24 oct. 2026.