[1] Robert Bosch Krankenhaus, Dept Geriatr, Stuttgart, Germany
[2] Ulm Univ, Inst Epidemiol & Med Biometry, Ulm, Germany
[3] Carl von Ossietzky Univ Oldenburg, Fakulty Med & Hlth Sci, Dept Hlth Serv Res, Oldenburg, Germany
[4] Univ RWTH Aachen Franziskus, Med Dept Geriatr Med, Aachen, Germany
[5] Univ Hosp, Unit Digital Geriatr Med, Heidelberg, Germany