ROCHE, D.; MURPHY, A. ‘Steeple sign’ in PHACE syndrome. European Journal of Pediatric Dermatology, [S. l.], v. 31, n. 2, p. 113–114, 2021. DOI: 10.26326/2281-9649.31.2.2246. Disponível em: https://ejpd.migration.pkpps03.publicknowledgeproject.org/index.php/journal/article/view/2246. Acesso em: 9 sept. 2026.