1. Department of Mitochondrial Biology, Max Planck Institute for Biology of Ageing, Cologne, Germany
2. Université de Bordeaux and the Centre National de la Recherche Scientifique, Institut de Biochimie et Génétique Cellulaires UMR 5095, Saint-Saëns, Bordeaux, France
3. FACS & Imaging Core Facility, Max Planck Institute for Biology of Ageing, Cologne, Germany
4. Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden