1 Arctic technology Centre, Department of Civil Engineering, Technical University of Denmark, Kongens Lyngby, Denmark. pej@byg.dtu.dk.
2 Arctic Investigations Program, Division of Preparedness and Emerging Infections, National Center for Emerging and Zoonotic Infectious Diseases, US Centers for Disease Control and Prevention, Anchorage, Alaska, USA.
3 Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU), Ås, Norway.
4 University Center in Svalbard (UNIS), Arctic Technology, P.O. Box 156, NO 9171, Longyearbyen, Svalbard, Norway.