Kiki Krevani, C. et al. 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 (Jan. 2024), 46–54. DOI:https://doi.org/10.63918/fhr.v1.n1.p46-54.2024.