Hentzen, J. E. K. R.; van Wijk, L.; Buis, C. I.; Viddeleer, A. R.; de Bock, G. H.; van der Schans, C. P.; van Dam, G. M.; Kruijff, S.; Klaase, J. M. Impact and Risk Factors for Clinically Relevant Surgery-Related Muscle Loss in Patients After Major Abdominal Cancer Surgery: Study Protocol for a Prospective Observational Cohort Study (MUSCLE POWER). Int J Clin Trials 2019, 6, 138-146.