SMART, C. R.; PAULSON, G.; CEBALLOS, F. Cáncer prevention:: Ecuador and the United States. Oncología (Ecuador), [S. l.], v. 8, n. 4, 1998. Disponível em: https://roe.solca.med.ec/index.php/johs/article/view/147. Acesso em: 7 jul. 2024.