Irshad, M., A. Ahmad, K. F. Ahmed, M. Hayat, R. Kareem, M. Hussain, N. Ali, and B. Khan. “RISK FACTORS FOR PRETERM BIRTHS IN A TERTIARY CARE HOSPITAL, LADY READING HOSPITAL, PESHAWAR”. Journal of Postgraduate Medical Institute, vol. 26, no. 2, Mar. 2012, https://jpmi.org.pk/index.php/jpmi/article/view/1257.