1. Biostatistics, School of Public Health & Community Medicine, Institute of Medicine at Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Occupational & Environmental Medicine, School of Public Health & Community Medicine, Institute of Medicine at Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
3. Department of Psychology University of Gothenburg Gothenburg Sweden
4. Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences University of Gothenburg Gothenburg Sweden