Algorithmic Bioinformatics, Institute for Bioinformatics, FU Berlin, Berlin, Germany.|Computational Genomics, IBM Thomas J Watson Research Center, Yorktown Heights, NY, USA.|Bioinformatics Unit (MF1), Robert Koch Institute, Berlin, Germany.|Centre for Biological Threats and Special Pathogens (ZBS1), Robert Koch Institute, Berlin, Germany.|Algorithmic Bioinformatics, Institute for Bioinformatics, FU Berlin, Berlin, Germany.|Bioinformatics Unit (MF1), Robert Koch Institute, Berlin, Germany.|Algorithmic Bioinformatics, Institute for Bioinformatics, FU Berlin, Berlin, Germany.