1. UNI Research Environment P O Box 7810 5020 Bergen Norway
2. Department of Geography University of Bergen P O Box 7802 5020 Bergen Norway
3. Department of Biology University of Bergen P O Box 7800 5020 Bergen Norway
4. Norwegian Institute of Public Health P O Box 4404 Nydalen 0403 Oslo Norway
5. Department of Global Public Health and Primary Care University of Bergen Bergen Norway
6. Department of Linguistic, Literary and Aesthetic Studies University of Bergen Sydnesplassen 7 5007 Bergen Norway