Chapter 8 Permissive weight bearing in surgically treated trauma patients with peri- and/or intra-articular fractures of the lower extremities is cost-effective: a prospective comparative multicenter cohort study Kalmet PHS Maduro CV Andriessen MT Moens-Oyen CPA Hiligsmann MJC van Vugt R Janzing H Jaspars C Sintenie JB van der Veen A Seelen HAM Blokhuis TJ Brink PRG Poeze M Evers SMAA Submitted