1. Université de Lorraine, CNRS, IMoPA, F-54000 Nancy, France
2. RNA Molecular Biology, Fonds de la Recherche Scientifique (F.R.S/FNRS), Université Libre de Bruxelles (ULB), and Center for Microscopy and Molecular Imaging (CMMI), B-6041 Charleroi-Gosselies, Belgium
3. Wellcome Center for Cell Biology, University of Edinburgh, Scotland, UK