1. Department of Internal Medicine III (Medicine of Ageing); Geriatrics Centre Erlangen; Hospital of the Congregation of St Francis Sisters of Vierzehnheiligen; Erlangen Germany
2. Institute of Biomedicine of Ageing (IBA); Friedrich-Alexander University Erlangen-Nürnberg (FAU); Nürnberg Germany
3. Department of Geriatrics; St Marien-Hospital Borken; Borken Germany
4. Department of Internal Medicine and Geriatrics; Hospital of the Order of St John of God; Regensburg Germany