The doubly-labelled water technique for measurement of energy expenditure in free-living animals.
D000818:Animals; D001834:Body Water / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D003903:Deuterium; D004734:Energy Metabolism; D007553:Isotope Labeling; D010103:Oxygen Isotopes; D014316:Tritium
D010103:Oxygen Isotopes; D014316:Tritium; D002245:Carbon Dioxide; D003903:Deuterium