1. Institute of Zoology, Cell and Matrix Biology, Johannes Gutenberg-University, Johannes-von-Müller-Weg 6, 55128 Mainz, Germany
2. Department of Rheumatology, Clinical Immunology and Allergology Inselspital, University of Bern, 3010 Bern, Switzerland
3. Department of Biomedical Engineering, Biointerface Laboratory, RWTH Aachen University, Pauwelsstrasse 30, 52074 Aachen, Germany