aNormal iodine: 310 ng/g in diet; 8.2 ng/mL in drinking water.
bFluoride: 1.856 ppm in diet; 0.4 mg/L in drinking water.
cP < 0.01, compared with group 1 (control).
dLow iodine: 20-62.5 ng/g in diet; deionized drinking water.
eAlso statistically significant at 2 hours and 6 hours (P < 0.01, compared with group 1).
fFluoride: 1.743 ppm in diet; deionized water.
ABBREVIATIONS: cpm, counts per minute; G.U., guaiacol unit; TPO, thyroid peroxidase.
SOURCE: Guan et al. 1988. Reprinted with permission; copyright 1988, Chinese Medical Association.