[1] Univ Cologne, Inst Med Sociol Hlth Serv Res & Rehabil Sci, Fac Med, Chair Hlth Serv Res, Cologne, Germany
[2] Univ Cologne, Univ Hosp Cologne, Cologne, Germany
[3] Univ Hosp Bonn, Ctr Hlth Commun, Clin & Policlin Psychosomat Med & Psychotherapy, Bonn, Germany
[4] Univ Hosp Bonn, Hlth Serv Res, Clin & Policlin Psychosomat Med & Psychotherapy, Bonn, Germany
[5] Aachen Bonn Cologne Dusseldorf, Ctr Integrated Oncol, CIO, ABCD, Aachen, Germany
[6] Univ Bonn, Clin & Policlin Psychosomat Med & Psychotherapy, Univ Hosp Bonn, D-53105 Bonn, Germany
[7] Maastricht Univ, Med Ctr, Dept Clin Pharm & Toxicol, Maastricht, Netherlands
[8] Maastricht Univ, CARIM Sch Cardiovasc Dis, Maastricht, Netherlands
[9] Rhein Westfal TH Aachen, Fac Med, Dept Hematol Oncol Hemostaseol & Stem Cell Transpl, Aachen, Germany
[10] Heinrich Heine Univ Dusseldorf, Clin Inst Psychosomat Med & Psychotherapy, Med Fac, Dusseldorf, Germany
[11] Heinrich Heine Univ Dusseldorf, Univ Hosp Dusseldorf, Dusseldorf, Germany
[12] Heinrich Heine Univ Dusseldorf, Inst Hlth Serv Res & Hlth Econ, Fac Med, Dusseldorf, Germany
[13] German Diabet Ctr, Inst Hlth Serv Res & Hlth Econ, Dusseldorf, Germany