1. School of Natural Resources & Environment; University of Michigan, Dana Hall, 440 Church Street, Ann Arbor, Michigan 48109
2. Department of Biology; Eastern Michigan University, Mark Jefferson Science Complex, 900 Oakwood Street, Ypsilanti, Michigan 48197
3. Section of Human and Animal Physiology; Department of Biology, University of Athens, Panepistimioupolis 157-84, Athens, Greece