SEARCH Articles Figures Tables 1 -labeled tracers Isotope isotopic labeling Isotope label Isotope labeling techniques Isotope labelling techniques Isotope tracer technique Isotope-labelled Isotopic labeling Isotopic labelled Isotopic labelling Isotopic labels Isotopic tracer techniques Isotopical labeling Labelling techniques Tracer labeling Tracers isotopes Use of Isotopically Labeled Compounds (Tracer Technique)