About the Authors

Thomas Ruf

To whom correspondence should be addressed. E-mail: thomas.ruf@vu-wien.ac.at

Affiliation Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria

Teresa Valencak

Affiliation Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria

Frieda Tataruch

Affiliation Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria

Walter Arnold

Affiliation Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria

Competing Interests

Competing interests: The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TR. Analyzed the data: TR TV. Contributed reagents/materials/analysis tools: WA. Wrote the paper: TR. Other: Collected all tissue samples and literature data: TV. Performed all chemical analyses: FT. Contributed to the writing of the paper: WA.