Additional file 1: of Assessing pre- and postoperative activity levels with an accelerometer: a proof of concept study van der MeijEva van der PloegHidde van den HeuvelBaukje DwarsBoudewijn MeijerinkW. BonjerH. HuirneJudith AnemaJohannes 2017 Activity diary. The activity diary in which was completed by the patients. (DOCX 21 kb)