Pulmonary hypertension in thalassemic children: does endothelial dysfunction play a role? Research Authors EG Ebtesam M, E Khalid I, AE Nafisa HR, F Mohamed A, N Khalid A Research Date Fri, 8 Aug 2008 - 12:00 Research Department Department of Pediatrics Research Member Nafisa Hasan Rifaat Abdel-Aziz