Validation of the APACHE‐II scoring system in critically ill patients diagnosed with COVID‐19 and admitted at a regional‐level hospital intensive care unit: A retrospective study: A retrospective study. South Afr J Crit Care [Internet]. 2025 Sep. 23 [cited 2026 May 2];41(2):e1522. Available from: https://samajournals.co.za/index.php/sajcc/article/view/1522