1. Research Unit for General Practice, Aarhus University, Aarhus, Denmark
2. Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
3. Research Unit for General Practice, Aarhus University, Aarhus, Denmark3Section for General Practice, Department of Public Health, Aarhus University, Aarhus, Denmark
4. Section for General Practice, Department of Public Health, Aarhus University, Aarhus, Denmark4Research Programme for Mental Child Health, Department of Public Health, Aarhus University, Aarhus, Denmark
5. Centre for Integrated Register-Based Research, Aarhus University, Aarhus, Denmark
6. National Institute for Health and Welfare, Helsinki, Finland7Nordic School of Public Health, Gothenburg, Sweden
7. Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Solna, Stockholm, Sweden