A comparative study of software programmes for cross-sectional skeletal muscle and adipose tissue measurements on abdominal computed tomography scans of rectal cancer patients. - van Vugt JL; Levolger S; Gharbharan A; Koek M; Niessen WJ; Burger JW; Willemsen SP; de Bruin RW; IJzermans JN (Journal of cachexia, sarcopenia and muscle, 2017)