Prastyo CE, Sari DM. Challenges of Sustainability of Employer-Based Retirement Healthcare Services in Indonesia: A Longitudinal Analysis of Demographic Transition and Healthcare Costs 2019–2023. j. ilm. kesehat. [Internet]. 2026 Mar. 30 [cited 2026 Oct. 28];18(1):238 – 249. Available from: https://journal.thamrin.ac.id/index.php/jikmht/article/view/3714