“Disparity in Health Care Utilization by Income Level and Insurance Status at Gamping Muhammadiyah Hospital, Yogyakarta, Indonesia” (2019) Journal of Health Policy and Management, 4(3), pp. 195–203. Available at: https://www.thejhpm.com/index.php/thejhpm/article/view/141 (Accessed: 16 January 2026).