1. Merck OY, Espoo, Finland, an affiliate of Merck KGaA, Darmstadt, Germany
2. Translational Stem Cell Biology and Metabolism Program, Research Program Unit, Faculty of Medicine, University of Helsinki, Helsinki, Finland
3. Max Planck Institute for Biology of Ageing
4. Merck AB, Solna, Sweden, an affiliate of Merck KGaA, Darmstadt
5. Translational Immunology Program, University of Helsinki, Helsinki, Finland