Widjanarko, Mas, Mutiara Nindya, Glenn Fernandez, and Axel Jovito. “Comorbidities and COVID-19 Severity in Pediatric Patients: Systematic Review and Meta-Analysis”. Paediatrica Indonesiana 62, no. 1 (February 18, 2022): 51-60. Accessed July 20, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/2720.