Ekici, Filiz, et al. “The Incidence and Follow-up of Isolated Ventricular Septal Defect in Newborns by Echocardiographic Screening”. The Turkish Journal of Pediatrics, vol. 50, no. 3, June 2008, pp. 223-7, https://doi.org/10.24953/turkjpediatr.2008.2419.