Bioinformatics Group, Department of Computer Science, University of Freiburg, Freiburg, Germany.|Bioinformatics Facility, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.|Bioinformatics Group, Department of Computer Science, University of Freiburg, Freiburg, Germany.|Deep Sequencing Facility, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.|Bioinformatics Facility, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.|Deep Sequencing Facility, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany.