1. Swammerdam Institute for Life Sciences, University of Amsterdam , Amsterdam, the Netherlands
2. Institute of Biochemistry, University of Greifswald , Greifswald, Germany
3. Laboratoire de Genetique Microbienne, Domaine de Vilvert, Institut National de la Recherche Agronomique , Jouy-en-Josas, France
4. RNA Biology and Applied Bioinformatics Research Group, Swammerdam Institute for Life Sciences, University of Amsterdam , Amsterdam, the Netherlands