GOTWAY CRAWFORD, C. A.; OKORO, C. A.; AKCIN, H. M.; DHINGRA, S. An Experimental Study Using Opt-in Internet Panel Surveys for Behavioral Health Surveillance. Online Journal of Public Health Informatics, [S. l.], v. 5, n. 1, 2013. DOI: 10.5210/ojphi.v5i1.4429. Disponível em: https://ojphi.org/ojs/index.php/ojphi/article/view/4429. Acesso em: 21 jan. 2022.