1. Imec, Leuven 3001, Belgium
2. Department of Physics and Astronomy, KU Leuven, Leuven 3001, Belgium
3. Department of Molecular and Microbial Systems, Centre of Microbial and Plant Genetics, KU Leuven, Leuven 3001, Belgium
4. Center for Microbiology, Flanders Institute for Biotechnology, VIB, Leuven 3001, Belgium