About the Authors

Christoph Gerhardt

Affiliation Institute for Animal Developmental and Molecular Biology, Heinrich Heine University, Düsseldorf, Germany

Johanna M. Lier

Affiliation Institute for Animal Developmental and Molecular Biology, Heinrich Heine University, Düsseldorf, Germany

Stefanie Kuschel

Affiliation Institute for Animal Developmental and Molecular Biology, Heinrich Heine University, Düsseldorf, Germany

Ulrich Rüther

ruether@hhu.de

Affiliation Institute for Animal Developmental and Molecular Biology, Heinrich Heine University, Düsseldorf, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CG UR. Performed the experiments: CG JL SK. Analyzed the data: CG JL. Wrote the paper: CG JL UR.