[1] Med Lab Oost Nederland, Medlon, Enschede, Netherlands
[2] Med Spectrum Twente, MST, Enschede, Netherlands
[3] Maasstad Hosp, Dept Clin Chem, Rotterdam, Netherlands
[4] Maasstad Hosp Rotterdam, Dept Cardiol, Rotterdam, Netherlands
[5] Papworth Hosp, Dept Anaesthesia & Intens Care, Cambridge, England
[6] Thorax Ctr Twente, Med Spectrum Twente, MST, Enschede, Netherlands