BRITTON, Keith E. Summary and Perspectives. Acta Oncologica, [S. l.], v. 35, n. 3, p. 385–390, 1996. DOI: 10.3109/02841869609101656. Disponível em: https://medicaljournalssweden.se/actaoncologica/article/view/27947. Acesso em: 18 may. 2026.