Darmawan, R., Indrajaya, T. and Bahar, E. 2020. Comparison between Serum Aldosterone Levels in Class I-II and Class III-IV Functional Heart Failure Patients. Open Access Macedonian Journal of Medical Sciences. 8, B (Dec. 2020), 1225–1228. DOI:https://doi.org/10.3889/oamjms.2020.5541.