1. Department of Laboratory Medicine, Children's and Women's Health; Norwegian University of Science and Technology (NTNU); Trondheim Norway
2. National Center for Fetal Medicine, Department of Obstetrics and Gynecology, St Olavs Hospital; Trondheim University Hospital; Trondheim Norway
3. Department of Pathology and Medical Genetics, St Olavs Hospital; Trondheim University Hospital; Trondheim Norway