1. Institute of Tropical Medicine and International Health, Charité—University Medicine Berlin, Berlin, Germany
2. Northern Region Malaria Project (NORMAP), Tamale, Ghana
3. Regional Health Administration, Bolgatanga, Ghana
4. School of Medicine and Health Sciences, University for Development Studies, Tamale, Ghana
5. Regional Health Administration, Takoradi, Ghana
6. Institute of Biostatistics and Clinical Epidemiology, Charité—University Medicine Berlin, Berlin, Germany