[1] Univ Oulu, Oulu, Finland
[2] KAS Gentofte, Kardiol Afdeling, Hellerup, Denmark
[3] Kuopio Univ Hosp, SF-70210 Kuopio, Finland
[4] Tampere Univ Hosp, Tampere, Finland
[5] CHR La Citadelle Liege, Liege, Belgium
[6] Paijat Hame Cent Hosp Lahti, Lahti, Finland
[7] Amtssygehuset Glostrup, Med Afdeling CF, Glostrup, Denmark
[8] Bakken Res Ctr Medtron, Clin Outcomes Res & Biometry, Maastricht, Netherlands