About the Authors

Xiang Wang

Affiliation University of Bergen, Department of Biomedicine, Bergen, Norway

Nickolay Vassilev Bukoreshtliev

Current address: Centre for Interdisciplinary Nanophysics, Department of Physics, University of Ottawa, Ottawa, Ontario, Canada

Affiliation University of Bergen, Department of Biomedicine, Bergen, Norway

Hans-Hermann Gerdes

hans-hermann.gerdes@biomed.uib.no

Affiliation University of Bergen, Department of Biomedicine, Bergen, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: NVB XW HHG. Performed the experiments: NVB XW. Analyzed the data: NVB XW HHG. Wrote the paper: XW HHG.