1. Institute of Microbiology, University of Greifswald, Greifswald, Germany
2. Center for Functional Genomics of Microbes, University of Greifswald, Greifswald, Germany
3. Institute for Mathematics and Computer Science, University of Greifswald, Greifswald, Germany
4. Human Molecular Genetics Group, Department of Functional Genomics, Interfaculty Institute for Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany