LIN, Guan-Yu; LEE, Jiunn-Tay; PENG, Giia-Sheun; YANG, Fu-Chi. Sildenafil can induce the onset of a cluster headache bout. Canadian Urological Association Journal, [S. l.], v. 8, n. 5-6, p. e378–80, 2014. DOI: 10.5489/cuaj.1736. Disponível em: https://cuaj.ca/index.php/journal/article/view/1736. Acesso em: 27 may. 2026.