SAEED, A.; KALFAH, A.; MOHAMMED, Z. Comparing the accuracy of nasopharyngeal COVID-19 PCR alone versus combined nasopharyngeal and oropharyngeal COVID-19 PCR tests. International Journal of Research in Medical Sciences, [S. l.], v. 11, n. 11, p. 3969–3975, 2023. DOI: 10.18203/2320-6012.ijrms20233363. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/12757. Acesso em: 23 dec. 2025.