1. Department of Zoophysiology, Aarhus University, Aarhus C, Denmark
2. Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
3. School of Biomedical Sciences, University of Leeds, Leeds, UK
4. Department of Zoology, University of British Columbia, Vancouver, BC, Canada
5. Department of Biological Sciences, Ohio University, Athens, OH, USA
6. Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA