Ultrasound-guided Ganglion Impar Block during the COVID-19 Pandemic: Two Case Reports. Acta Medica Philippina, [S. l.], v. 56, n. 18, 2022. DOI: 10.47895/amp.v56i18.5659. Disponível em: https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/5659. Acesso em: 9 apr. 2025.