The Impact of the COVID-19 Pandemic on Healthcare Costs: A Descriptive Cross-Sectional Study. Principles and Practice of Clinical Research, [S. l.], v. 8, n. 4, 2023. DOI: 10.21801/ppcrj.2022.84.8. Disponível em: https://journal.ppcr.org/index.php/ppcrjournal/article/view/207.. Acesso em: 10 apr. 2025.