About the Authors

Jos Käfer

¤ Current address: Laboratoire de Spectrométrie Physique, CNRS/Université Joseph Fourier, Grenoble, France

Affiliation Theoretical Biology and Bioinformatics, Utrecht University, Utrecht, Netherlands

Paulien Hogeweg

Affiliation Theoretical Biology and Bioinformatics, Utrecht University, Utrecht, Netherlands

Athanasius F. M Marée

To whom correspondence should be addressed. E-mail: A.F.M.Maree@bio.uu.nl

Affiliation Theoretical Biology and Bioinformatics, Utrecht University, Utrecht, Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

JK and AFMM conceived and designed the experiments. JK and AFMM performed the experiments. JK, PH, and AFMM wrote the paper.