1. Department of Public Health and General Practice Norwegian University of Science and Technology Trondheim Norway
2. Department of Obstetrics and Gynecology St. Olavs Hospital Trondheim University Hospital Trondheim Norway
3. Department of Laboratory Medicine Children's and Women's Health Norwegian University of Science and Technology Trondheim Norway
4. Department of Pathology and Medical Genetics St. Olavs Hospital Trondheim University Hospital Trondheim Norway