Manual, A., Ab Hamid, J., Jawahir, S., Amer Nordin, A., Ab Rahim, I., Mohd Noh, S. N., Abdul Mutalib, N. E., Rata Mohan, D. S., Mohamed Razif, I., & Ibrahim, M. Y. (2026). Healthcare Utilisation Inequality and the Hidden Burden of Out-of-Pocket Expenditures in Sabah. Borneo Journal of Medical Sciences (BJMS), 20(3), 367–379. https://doi.org/10.51200/bjms.v20i3.6445