1. Section for Ethics and Health Economics, Department of Global Health and Primary Care, University of Bergen, Bergen, Norway
2. Dental Biomaterials Adverse Reaction Unit, NORCE Norwegian Research Centre AS, Bergen, Norway
3. Institute for Applied Epistemology and Medical Methodology, University of Witten/Herdecke, Witten, Germany
4. Department of Community Medicine, National Research Center in Complementary and Alternative Medicine, NAFKAM, UiT The Arctic University of Norway, Tromsø, Norway
5. Department of Clinical Dentistry, University of Bergen, Bergen, Norway