Simanjuntak, Sumardi, Titis Prawitasari, Muzal Kadim, Teny Sari, Hartono Gunardi, Yvan Vandenplas, and Badriul Hegar. “Functional Gastrointestinal Disorders in Adolescents During Online Learning”. Paediatrica Indonesiana 63, no. 5 (October 30, 2023): 353-60. Accessed May 22, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/3294.