1. Institute for Biomechanics Otto‐Stern‐Weg 7, ETH Zürich Zürich CH‐8093 Switzerland
2. Poly‐Med Inc 51 Technology Drive Anderson SC 29625 USA
3. Regenerative Therapy Unit Lausanne University Hospital University of Lausanne Épalinges CH‐1066 Switzerland
4. Center for Applied Biotechnology and Molecular Medicine University of Zürich Zürich CH‐8057 Switzerland