1. Department of Geriatrics; Klinikum Klagenfurt; Klagenfurt Austria
2. Department of Anesthesiology and Intensive Care Medicine; Klinikum Klagenfurt; Klagenfurt Austria
3. Department of Statistics; Alpen-Adria University Klagenfurt; Klagenfurt Austria
4. Research Centre; I.M. Sechenov First Moscow State Medical University; Moscow Russia
5. Department of Sport Science, Medical Section; University of Innsbruck; Innsbruck Austria