1. Institute for Surgical Research, Oslo University Hospital, Rikshospitalet , Postboks 4950 Nydalen, 0424 Oslo , Norway
2. The Intervention Centre, Oslo University Hospital, Rikshospitalet , Postboks 4950 Nydalen, 0424 Oslo , Norway
3. Department of Cardiology, Pulmonology, Hypertension and Nephrology, Ehime University Graduate School of Medicine , Toon , Japan
4. Institute for Surgical Research, Division of Cardiovascular and Pulmonary Diseases, Oslo University Hospital, Rikshospitalet and University of Oslo , Oslo , Norway