1. Department of Nuclear Medicine; University Hospital, LMU Munich; Marchioninistrasse 15 81377 Munich Germany
2. Helmholtz-Zentrum München; German Research Center for Environmental Health; Research Group Gene Vectors; Marchioninistrasse 25 81377 Munich Germany
3. Department of Otorhinolaryngology; University Hospital, LMU Munich; Marchioninistrasse 15 81377 Munich Germany