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Saudi Journal of Biological Sciences. http://dx.doi.org/10.1016/j.sjbs.2016.03.006 Open Access
Shoman et al. Globalization and Health (2017) 13:1 DOI 10.1186/s12992-016-0224-2
20-22 July 2015, Monrovia, Liberia
Standard Operating Procedures for Procurement in the Public Health Sector. Updated 2006.