1 Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children´s Hospital, Medical Faculty, Düsseldorf, Germany, Komfo Anokye Teaching Hospital, Kumasi, Ghana.
2 Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana.
3 Komfo Anokye Teaching Hospital, Kumasi, Ghana, Kumasi Centre for Collaborative Research in Tropical Medicine, Kumasi, Ghana, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
4 Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children´s Hospital, Medical Faculty, Düsseldorf, Germany.