1. Psychiatric Center Copenhagen, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
2. Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark
3. National Institute of Public Health, University of Southern Denmark, Odense
4. Geological Survey of Denmark and Greenland, Copenhagen, Denmark
5. Department of Geoscience, Aarhus University, Aarhus, Denmark
6. Geological Survey of Denmark and Greenland, Copenhagen, Denmark5Department of Geoscience, Aarhus University, Aarhus, Denmark6Department of Geography, National University of Singapore, Singapore