1. Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
2. Division of Occupational and Environmental Medicine, Department of Laboratory Medicine, Lund University, Lund, Sweden
3. MTM Research Centre, School of Science and Technology, Örebro University, Örebro, Sweden
4. Department of Occupational and Environmental Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
5. National Institute of Occupational Health, Oslo, Norway
6. Centre for Occupational and Environmental Medicine (CAMM), Stockholm County Council, Stockholm, Sweden