1 Department of Dermatology, University of Cologne, Cologne, Germany.
2 Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany.
3 Cologne Excellence Cluster on Cellular Stress Responses in Aging-associated Diseases (CECAD), University of Cologne, Cologne, Germany.
4 Department of Dermatology and Cutaneous Surgery, Wound Healing and Regenerative Medicine Research Program, University of Miami Miller School of Medicine, Miami, Florida, USA.