The early measurement of exchangeable sodium (24Na).
D000328:Adult; D000368:Aged; D001966:Bromine / Q000378:metabolism; D005110:Extracellular Space; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012975:Sodium Isotopes / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism*; D013997:Time Factors
D012975:Sodium Isotopes; D001966:Bromine