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Research Article
BMC Infectious Diseases 2012, 12:262; doi:10.1186/1471-2334-12-262
17–24 November 2015
South Eastern European Journal of Public Health, EEJPH 2016, posted: 11 January 2016. DOI 10.4119/UNIBI/SEEJPH-2016-85
Updated to Reflect the 2009 Medical Eligibility Criteria of the World Health Organization