Affiliation: | (1) Department of Paediatrics, University Hospital Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands;(2) Department of Paediatrics, Free University of Amsterdam, De Boelelaan 1117, 1007 MB Amsterdam, The Netherlands;(3) Bezirkkrankenhaus Suhl, Suhl, German Democratic Republic;(4) Ernst-Moritz-Arndt Universität, Greifswald, German Democratic Republic |