1. OBRR/DBCD/LCH US Food and Drug Administration Silver Spring Maryland
2. OTAT/DPPT/HB in the Center for Biologics Evaluation and Research US Food and Drug Administration Silver Spring Maryland
3. Institute of Experimental Hematology and Transfusion Medicine University Clinic Bonn Bonn Germany
4. Center for Rare Diseases Bonn (ZSEB) University Clinic Bonn Bonn Germany