Using established occupational respiratory cancer risk factors for assessing the internal validity in an unmatched case-control study in the Campania Region of Italy, 1988-1990. European Journal of Oncology and Environmental Health, [S. l.], v. 12, n. 1, p. 23–29, 2017. Disponível em: https://mattioli1885journals.com/index.php/EJOEH/article/view/4958.. Acesso em: 1 jul. 2024.