Sara A Wickström1, Pere Roca-Cusachs2. 1. Helsinki Institute of Life Science, Biomedicum Helsinki, University of Helsinki, Finland; Wihuri Research Institute, Biomedicum Helsinki, University of Helsinki, Finland; Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Finland; Max Planck Institute for Biology of Ageing, Cologne, Germany; Cologne Excellence Cluster for Stress Responses in Ageing-associated Diseases (CECAD), University of Cologne, Germany. Electronic address: sara.wickstrom@helsinki.fi. 2. Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Technology (BIST), 08028, Barcelona, Spain; Universitat de Barcelona, 08036, Barcelona, Spain. Electronic address: proca@ibecbarcelona.eu.