Tiller DPS, Trondheim, Norway
St.Olavs University Hospital, Trondheim, Norway
Røros Medical Center, Røros, Norway
St Olavs Hospital, Trondheim, Norway
Sykehuset Innlandet HF, Lillehammer, Norway
Department of Obstetrics, Vestre Viken Hospital Trust, Drammen, Norway
St.Olavs Hospital, Trondheim, Norway
Norwegian National headache Centre, NTNU, Trondheim, Norway
University Hospital Antwerp, Antwerp, Belgium
Ålesund Hospital, Alesund, Norway
Centre Hospitaliers de Luxembourg, Luxembourg, Luxembourg
Department of Circulation and Medical Imaging , NTNU, Trondheim, Norway
Norwegian National Headache Centre, St. Olavs University Hospital, Trondheim, Norway
Norwegian University of Science and Technology, Trondheim, Norway