Z. Razzaq, M. Aslam, M. M. Hussain, S. Naqvi, M. Zameer, and A. Badar, “VARIABLE RESPONSE TO INHALED NITRIC OXIDE IN POSTOPERATIVE PATIENTS OF MITRAL STENOSIS WITH PULMONARY HYPERTENSION”, J Ayub Med Coll Abbottabad, vol. 21, no. 1, pp. 98–102, Mar. 2009.