Data synthesis
We planned to conduct separate analyses for the four comparisons: enteral feeding versus standard care; total parenteral nutrition versus standard care; enteral versus total parenteral nutrition; and enteral versus enteral with supplemental parenteral nutrition. We planned to calculate results using a random-effects model. We assessed the quality of the body of evidence using the GRADE approach. We considered the following domains: study limitations, consistency of effect, imprecision, indirectness, and publication bias.