About the Authors

Kai Puolamäki

To whom correspondence shoud be addressed. E-mail: Kai.Puolamaki@hut.fi

Affiliation Laboratory of Computer and Information Science, Helsinki University of Technology, Espoo, Finland

Mikael Fortelius

Affiliation Department of Geology and Institute of Biotechnology, University of Helsinki, Helsinki, Finland

Heikki Mannila

Affiliation HIIT Basic Research Unit, University of Helsinki and Helsinki University of Technology, Helsinki, Finland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KP, MF, and HM conceived and designed the experiments. KP performed the experiments. KP, MF, and HM analyzed the data. KP, MF, and HM contributed reagents/materials/analysis tools. KP, MF, and HM wrote the paper.