CONCENTRATION OF IODINE BY HUMAN EXTRATHYROIDAL IODIDE CONCENTRATING (ETIC) TISSUES Ci Fluid-to-plasma ratio ce Saliva Average Range Reference 48 63 48 (est.) 12 - 211 42 - 101 10 - 86 Honour (1952) Jaimet et al. (1966) Schiff et al. (1947) _ Gastric juice 33 15 - 84 Honour (1952) Milk 24 11 - 36 Honour (1952) 28 Miller & Weetch (1955) LRA-14