[1] Univ Leipzig, Inst Social Med Occupat Hlth & Publ Hlth, Leipzig, Germany
[2] McGill Univ, Douglas Mental Hlth Univ Inst, Montreal, PQ, Canada
[3] Ernst Moritz Arndt Univ Greifswald, Dept Psychiat, Greifswald, Germany
[4] Helios Hanseklinikum Stralsund, Stralsund, Germany
[5] Univ Haifa, Dept Gerontol, IL-31999 Haifa, Israel
[6] Univ Med Ctr Hamburg Eppendorf, Dept Med Sociol & Hlth Econ, Hamburg, Germany