AL-Kinani AAA. Clinical study of patients with primary pulmonary hypertension (PPH). JFacMedBagdad [Internet]. 2018 Sep. 2 [cited 2024 May 3];60(2):80-4. Available from: https://iqjmc.uobaghdad.edu.iq/index.php/19JFacMedBaghdad36/article/view/9