Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Clinic of Clinical Services, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Clinic of Clinical Services, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Department of Obstetrics and Gynaecology, St Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.Department of Physiotherapy, Oslo Metropolitan University, Oslo, Norway.