First mobilisation after abdominal and cardiothoracic surgery: when is it actually performed? A national, multicentre, cross-sectional study - Fagevik Olsén, Monika; Sehlin, Maria; Westerdahl, Elisabeth; Schandl, Anna; Block, Linda; Nygren-Bonnier, Malin; Svensson-Raskh, Anna (BMJ Open, 2024)