Schoor, S.R. van der

study infant preterm infants oxidation glucose enteral protein lysine period preterm threonine glutamine intake infusion splanchnic metabolism enrichment intestine leucine splanchnic tissues growth method breath tracer patient piglet tissue whole-body sample weight uptake kinetic group isotope chemotherapy pediatr children neonate nutrition effect result physiol blood table substrate breath samples goudoever van der schoor study days period b energy plasma body lysine oxidation factor equation schoor carbon amount synthesis production mucositi nasopharyngeal sampling method 13 co 2 utilization difference reeds protein synthesis sampling plateau study days 1 intragastric netherland balance value parenteral ratio postnatal age co 2 production blood samples carbon skeleton