1. Institute for Sustainable Malaria Control, Department of Biochemistry, Genetics and Microbiology, University of Pretoria, 0028 Pretoria, South Africa
2. Swiss Tropical and Public Health Institute, 4051 Basel, Switzerland
3. University of Basel, 4003 Basel, Switzerland
4. Centre of Excellence for Pharmaceutical Sciences, North-West University, 2531 Potchefstroom, South Africa