1. From the Division of Cardiology, Department of Internal Medicine, University of Oulu, Oulu, Finland (M.N., K.K., H.R.); Latvian Center of Cardiology, Paul Stradins Clinical Hospital, Riga, Latvia (A.E., I.K., S. Jegere, A.D.); Department of Cardiology, Aarhus University Hospital, Skejby, Aarhus, Denmark (N.R.H., M.M., E.H.C., J.F.L., L.T.); Department of Cardiology, The Feiring Clinic, Feiring, Norway (P.G., S.S.); Department of Cardiology, University Hospital of Tromsoe, Tromsoe, Norway (T.K.S., T...