Use of sildenafil in a patient with pulmonary hypertension: A case report . Research, Society and Development, [S. l.], v. 10, n. 3, p. e55010313717, 2021. DOI: 10.33448/rsd-v10i3.13717. Disponível em: https://rsdjournal.org/rsd/article/view/13717. Acesso em: 5 dec. 2025.