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2. Campos, Edgardo, and Sanjay Pradhan. 2007. The Many Faces of Corruption: Tracking Vulnerabilities at the Sector Level. Washington DC: World Bank. http://hdl.handle.net/10986/6848
3. DFID. 2010. How to Note: Addressing Corruption in the Health Sector. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/67659/How-to-Note-corruption-health.pdf
4. EHFCN European Healthcare Fraud and Corruption Network. 2017. Healthcare Fraud, Corruption, and Waste in Europe: National and Academic Perspectives. http://www.ehfcn.org/ehfcn-nza-book-healthcare-fraud-corruption-waste-europe/
5. Heywood, Paul M., and Mark Pyman. 2020. Rethinking Corruption Reform: Strategy, Scale, and Substance. Global Integrity Anticorruption Evidence Program.. https://ace.globalintegrity.org/wp-content/uploads/2020/12/GI-ACE_Research-Paper-Corruption-Strategy.pdf.