1. Institute of Human Genetics; University of Würzburg; Würzburg Germany
2. Institute of Experimental Haematology and Transfusion Medicine; University Clinic Bonn; Bonn Germany
3. Institute for Biochemistry; Medical School; Justus Liebig University; Giessen Germany
4. Metabolic Biochemistry; Department of Medicine; Adolf Butenandt Institute; Ludwig Maximilian University of Munich; Munich Germany