[1] Goethe Univ, Inst Gen Practice, Geriatr Med, Theodor Stern Kai 7, D-60590 Frankfurt, Germany
[2] Varisano Klinikum Frankfurt Hoechst, Dept Mental Hlth, Gotenstr 6-8, D-65929 Frankfurt, Germany
[3] Goethe Univ, Univ Hosp Frankfurt, Dept Psychiat Psychosomat Med & Psychotherapy, Heinrich Hoffmann Str 10, D-60528 Frankfurt, Germany
[4] Katholieke Univ Leuven, Dept Publ Hlth & Primary Care, Leuven, Belgium
[5] Maastricht Univ, Sch CAPHRI, Dept Family Med, Maastricht, Netherlands
[6] Philipps Univ Marburg, Fac Pharm, Dept Pharmacol & Clin Pharm, Karl von Frisch Str 2, D-35043 Marburg, Germany
[7] Bielefeld Univ, Med Sch East Westphalia, Gen Practice & Family Med, Morgenbreede 1, D-33615 Bielefeld, Germany