1. PharmacoEpidemiology and Drug Safety Research Group, Department of Pharmacy, and PharmaTox Strategic Initiative, Faculty of Mathematics and Natural Sciences University of Oslo Oslo Norway
2. Department for Health Evidence, Radboud Institute for Health Sciences Radboud University Medical Center Nijmegen The Netherlands
3. Department of Environmental Exposure and Epidemiology Norwegian Institute of Public Health Oslo Norway
4. Department of Child Health and Development Norwegian Institute of Public Health Oslo Norway