1. Heart and Lung Center (H.-K.N., J.L., K.E., R.K., P.S., M.K.)
2. Department of Pathology, HUSLAB (M.M.), Helsinki University Central Hospital, Finland
3. Heart Center, Turku University Hospital, Finland (T.V.)
4. Heart Center, Kuopio University Hospital, Finland (H.M.)
5. Medical Research Center Oulu, University & University Hospital of Oulu, Finland (K.K.)
6. Heart Hospital, Tampere University Hospital, Finland (P.H.)
7. Päijät-Häme Central Hospital, Lahti, Finland (T.K.)
8. Heart Center, North Karelia Central Hospital, Joensuu, Finland (T.T.R.)
9. Central Finland Central Hospital, Jyväskylä (J.K.)
10. South Ostrobothnia Central Hospital, Seinäjoki, Finland (A.A.)
11. Vaasa Central Hospital, Finland (P.P.-E.)
12. South Karelia Central Hospital, Lappeenranta, Finland (S.U.).