About the Authors
- Daniel H. Janzen, Winnie Hallwachs
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: DHJ WH. Performed the experiments: DHJ WH. Analyzed the data: DHJ WH. Contributed reagents/materials/analysis tools: DHJ WH. Wrote the paper: DHJ WH.