1. Colombia
2. The World Bank. Number of people spending more than 25% of household consumption or income on out-of-pocket health care expenditure. World Bank Data Bank Metadata Glossary. Accessed October 4, 2023. https://databank.worldbank.org/metadataglossary/health-nutrition-and-population-statistics/series/SH.UHC.OOPC.25.TO
3. Roemer MI . Out-of-pocket health care expenses for medical services, by insurance coverage, 2000-2014. In: Statistical Brief (Medical Expenditure Panel Survey (US)). Agency for Healthcare Research and Quality (US); 2017. Accessed October 4, 2023. https://www.ncbi.nlm.nih.gov/books/NBK447190/
4. Out-of-pocket expenditure on maternity care for hospital births in Uttar Pradesh, India
5. Analysis of out-of-pocket expenditure in utilization of maternity care services in urban slums of Rajkot City, Gujarat;Sharma;Indian J Community Med.,2018