GLASS, Harold E.; GUY, Andy. The Impact of COVID-19 on US Clinical Trial Activity. Archives of Clinical and Biomedical Research, [S. l.], v. 8, n. 3, p. 196–203, 2024. Disponível em: https://www.fortunejournals.org/ojs/index.php/acbr/article/view/15066. Acesso em: 24 aug. 2026.