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Evolution and expansion of the Mycobacterium tuberculosis PE and PPE multigene families and their association with the duplication of the ESAT-6 (esx) gene cluster regions
Nicolaas C Gey van Pittius*, Samantha L Sampson, Hyeyoung Lee, Yeun Kim, Paul D van Helden and Robin M Warren
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Corresponding author: Nicolaas C Gey van Pittius ngvp@sun.ac.za