1 Universitätsklinikum Carl Gustav Carus Dresden, Institute for Immunology, Dresden, Germany.
2 Institute of Molecular Biology, Mainz, Germany.
3 Department of Biology, Division of Genetics, Nikolaus-Fiebiger-Center for Molecular Medicine, Friedrich-Alexander-University Erlangen-Nuremberg (FAU), Erlangen, Germany.
4 Faculty of Biology, Albert-Ludwigs University Freiburg, Freiburg, Germany.