Interventions: Group 1: single assessment of all twelve tests of the RoBa-score shortly after primary cancer diagnosis Primary outcome(s): clinical feasibility of the RoBa-assessment as a whole with i
XLPE = cross-linked polyethylene; PE = polyethylene; HA = hydroxyapatite; CoCr = cobalt chrome; WOMAC = Western Ontario and McMaster University Osteoarthritis Index; SF-12 = Short Form Health Survey;
