Evolution of COVID-19 mortality over time: results from the Swiss hospital surveillance system (CH-SUR). Swiss Medical Weekly, [S. l.], v. 151, n. 4748, p. w30105, 2021. DOI: 10.4414/SMW.2021.w30105. Disponível em: https://smw.ch/index.php/smw/article/view/3111. Acesso em: 13 oct. 2025.