About the Authors

Vesa P Hytönen

¤ Current address: Institute of Medical Technology, University of Tampere, Finland

Affiliation Laboratory of Biologically Oriented Materials, Department of Materials, Swiss Federal Institute of Technology Zurich (ETH Zurich), Zürich, Switzerland

Viola Vogel

To whom correspondence should be addressed. E-mail: viola.vogel@mat.ethz.ch

Affiliation Laboratory of Biologically Oriented Materials, Department of Materials, Swiss Federal Institute of Technology Zurich (ETH Zurich), Zürich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

VPH and VV conceived and designed the experiments. VPH performed the experiments and analyzed the data. VV contributed reagents/materials/analysis tools. VPH and VV wrote the paper.