J. Bashir, Z. Ahmed, M. Ghafoor, M. Hussain, S. Zaman, and M. W. Babar, “Frequency of Respiratory Distress Syndrome in Preterm Infants Delivered at Pak Emirates Military Hospital, Rawalpindi”, PAFMJ, vol. 72, no. 4, pp. 1314–17, Sep. 2022.