[1] St Olavs Univ Hosp, Dept Immunol & Transfus Med, NO-7006 Trondheim, Norway
[2] Norwegian Univ Sci & Technol, Dept Lab Med Childrens andWomens Hlth, N-7034 Trondheim, Norway
[3] Norwegian Univ Sci & Technol, Dept Circulat & Med Imaging, N-7034 Trondheim, Norway
[4] St Olavs Univ Hosp, Dept Cardiothorac Anaesthesia & Intens Care, NO-7006 Trondheim, Norway
[5] St Olavs Univ Hosp, Dept Cardiothorac Surg, NO-7006 Trondheim, Norway