1. Regional Medicines Information and Pharmacovigilance Centre (RELIS), Oslo University Hospital, Oslo, Norway;
2. PharmacoEpidemiology and Drug Safety Research Group, Department of Pharmacy, University of Oslo, Oslo, Norway;
3. Regional Medicines Information and Pharmacovigilance Centre (RELIS), Haukeland University Hospital, Bergen, Norway;
4. Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway;
5. Department of Child Health and Development, Norwegian Institute of Public Health, Oslo, Norway