[1] Univ Gottingen, Univ Clin, Dept Cardiol & Pneumol, D-37099 Gottingen, Germany
[2] UCL, CRUK Hlth Behav Res Ctr, London, England
[3] UCL, Dept Epidemiol & Publ Hlth, London, England
[4] Univ Hosp Gottingen, Dept Cardiol & Pneumol, Gottingen, Germany
[5] IMIBE, Essen, Germany
[6] Clin Lung Dis, Immenhausen, Germany