Osuna, A., Garrido, A., Santos, C. ., Silva, R., Sequeira, M., Delgado, M., Carragoso, A., Lemos, A., Bastos, M. and Gaspar, O. (2006) “Community-Acquired Pneumonia and Pneumonia Severity Index 20 (PSI-20): a study of 262 patients”, Internal Medicine. Lisboa, Portugal, 13(3), pp. 162–171. Available at: https://revista.spmi.pt/index.php/rpmi/article/view/1641 (Accessed: 3 April 2025).