“Correlation between Oxygen Saturation and Hemoglobin and Hematokrit Levels in Tetralogy of Fallot Patients”, Althea Med J, vol. 3, no. 1, pp. 152–155, Mar. 2016, Accessed: Jul. 17, 2026. Available: https://journal.fk.unpad.ac.id/index.php/amj/article/view/724