1. Clinical Cooperation Group, Institute for Clinical and Molecular Biology, GSF-National Research Center for Environment and Health and
2. Children's Hospital, Hematology-Oncology, Technical University Munich, 80804 Munich, Germany
3. Clinical Cooperation Group Molecular Oncology, Department of Gene Vectors, GSF-National Research Center for Environment and Health,
4. Department of Otorhinolaryngology, and
5. Laboratory of Immunogenetics, Ludwig Maximilians University, 81377 Munich, Germany