Geriatric trauma patients at one Level 1 trauma center before and after ortho-geriatric co-management (OGC): an 8-year comparison - Halvachizadeh, S; Gröbli, L; Berk, T; Jensen, KO; Hierholzer, C; Pfeifer, R; Pape, HC (Zeitschrift für Orthopädie und Unfallchirurgie, 2020)