1. Institute of Health and Society, Faculty of Medicine, University of Oslo, PO Box 1072 Blindern, Oslo 0316, Norway
2. Norwegian Institute of Public Health, PO Box 222 Skøyen, Oslo 0213, Norway
3. School of Pharmacy, University of Oslo, PO Box 1068 Blindern, Oslo 0316, Norway
4. Center for Disease Dynamics, Economics & Policy, 1400 Eye Street Northwest, Suite 500, Washington DC 20005, United States
5. Princeton Environmental Institute, Princeton University, Guyot Hall, Room 129, Princeton, New Jersey 08544-1003, United States