1. Department of Molecular Medicine, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany, and Institute of Medical Biometry and Statistics, University Hospital Schleswig-Holstein—Campus Lübeck, Lübeck, Germany
2. Kumasi Centre for Collaborative Research, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
3. Department of Paediatrics, University of Ulm, Ulm, Germany