Alrashed A, Mohamed HR. Patient out-of-pocket expenditure in primary care comparing high income, middle income and low-income countries. Int. J. of Health Sci. [Internet]. 2024 Oct. 10 [cited 2026 Apr. 29];8(S1):1365-88. Available from: https://sciencescholar.us/journal/index.php/ijhs/article/view/15241