[1] Univ Hull, Castle Hill Hosp, Dept Cardiol, Kingston Upon Hull, Yorks, England
[2] Mil Inst Hlth Serv, Cent Clin Hosp, Warsaw, Poland
[3] Glasgow Royal Infirm, Dept Med Elderly, Glasgow, Lanark, Scotland
[4] Silesian Ctr Heart Dis, Dept Cardiol 3, Zabrze, Poland
[5] Univ Birmingham, Edgbaston, England
[6] L Warynski Silesian Med Acad, Div Cardiol 3, Katowice, Poland