means and standard deviations of selenium parameters were : plasma selenium 106.4 +/- 23.7 micrograms/l , erythrocyte selenium 0.59 +/- 0.19 microgram/g hb , toenail selenium 0.78 +/- 0.17 ppm , and erythrocyte glutathione peroxidase activity 28.0 +/- 8.1 u/g hb .
C0014792
erythrocyte
C0019046
hb