1. 2Genome Informatics, Faculty of Technology and Center for Biotechnology, Bielefeld University, Bielefeld, Germany
2. 1International Research Training Group "Computational Methods for the Analysis of the Diversity and Dynamics of Genomes", Bielefeld University, Bielefeld, Germany
3. 3School of Computer and Communication Sciences, EPFL, 1015 Lausanne, Switzerland
4. 4Department of Mathematics, Simon Fraser University, Burnaby, BC, Canada