PRIMA PFO Migraine Trial

Swiss Cardiovascular Center Bern, Bern

Kopfwehzentrum Hirslanden Zürich, Zurich

Unfallkrankenhaus Berlin, Berlin

Universitätsklinikum Hamburg, Hamburg

Neurologisch-verhaltensmedizinische Schmerzklinik Kiel, Kiel

Universitätsklinikum Münster, Münster

University of Calgary- Foothills Hospital, Calgary

Alberta Health Services and the University of Alberta, Edmonton

University of British Columbia, Vancouver

University of Ottawa, Ottawa

Davisville Medical Center, Toronto

Institut de Cardiologie de Montreal, Montreal

Centre Hospitalier Universitaire de Québec, Québec

Martin-Luther-University Halle-Wittenberg, Halle

Royal Sussex County Hospital, Brighton

St. Mary's Hospital Imperial College Healthcare NHS Trust, London

South Manchester University Hospital, Manchester