Nga , N. T. Q. ., and N. T. . Van. “Late Surfactant Replacement Therapy and Its Efficacy on Severe Bronchopulmonary Dysplasia in National Children Hospital”. Journal of Medical Research, vol. 148, no. 12, Dec. 2021, pp. 152-7, doi:10.52852/tcncyh.v148i12.422.