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2. World Bank GDP per capita http://data.worldbank.org/indicator/NY.GDP.PCAP.CD 2016
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4. World Health Organization Essential medicines and health products http://www.who.int/medicines/services/essmedicines_def/en/ 2016
5. World Health Organization WHO model list of essential medicines http://www.who.int/selection_medicines/committees/expert/20/EML_2015_FINAL_amended_AUG2015.pdf?ua=1 2016