1. Max Planck Institute for Biology of Ageing, Joseph-Stelzmann-Str. 9b, D-50931 Cologne, Germany
2. CECAD - Cluster of Excellence, University of Cologne, Joseph-Stelzmann-Str. 26, D-50931 Cologne, Germany
3. Helsinki Institute for Life Science, Biomedicum Helsinki, Haartmaninkatu 8, FI-00290 Helsinki, Finland
4. Wihuri Research Institute, Biomedicum Helsinki, Haartmaninkatu 8, FI-00290 Helsinki, Finland
5. Stem Cells and Metabolism Research Program, Faculty of Medicine, Biomedicum Helsinki, Haartmaninkatu 8, FI-00290 Helsinki, Finland
6. Center for Molecular Medicine Cologne (CMMC), University of Cologne, Robert-Koch-Str. 21, D-50931 Cologne, Germany