1. From the Gastrointestinal Investigation Unit & Centre for In Vivo Body Composition, Royal North Shore Hospital, St Leonards, Australia (RDH); the School of Exercise and Sport Science, The University of Sydney, Sydney, Australia (DAW, BDL, JNG, EURS, MWT, THG, and MAFS); the Centre for Experimental Radiation Oncology, Cancer Care Centre, St George Hospital, Kogarah, Australia (BJA); Balmain Hospit