Kiki Krevani, Citra, Muhammad Zakiy Azzuhdi, Feiky Herfandi Soegistiono, and Putri Maulina. 2024. “The Effectiveness of a 4-Week Physical Exercise Program in Patients With Pulmonary Arterial Hypertension: A Pilot Study in Sumatra”. Frontiers on Healthcare Research 1 (1): 46-54. https://frontiersin-healthcare-research.org/index.php/id/article/view/13.