1. PharmacoEpidemiology and Drug Safety Research Group, Department of Pharmacy University of Oslo Oslo Norway
2. NCRR—The National Centre for Register‐based Research Aarhus University Aarhus Denmark
3. CIRRAU—Centre for Integrated Register‐based Research Aarhus University Aarhus Denmark
4. Department of Clinical Research University of Southern Denmark Odense Denmark
5. Regional Department for Eating Disorders, Division of Mental Health and Addiction Oslo University Hospital Oslo Norway
6. Division of Mental Health and Addiction, Institute of Clinical Medicine University of Oslo Oslo Norway
7. UNC Center of Excellence for Eating Disorders, Department of Psychiatry University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
8. Department of Nutrition University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
9. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
10. Department of Child Health and Development Norwegian Institute of Public Health Oslo Norway