1. Zoophysiology, Department of Bioscience, Aarhus University, Building 1131, C. F. Moellers Alle 3, 8000 Aarhus C, Denmark
2. Comparative Medicine Lab, Aarhus University Hospital Skejby, 8200 Aarhus N, Denmark
3. Department of Biology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark