4Arthur JR, et al. The role of selenium in thyroid normone metabolism and effect of selenium dificienly on thyroid hormone and iodine metabolism. Biol Trace Elem Res 1992; 33: 37
5Chiba M. Toxic and trace elements in tabacco smoke. Bull WHO1993; 14(3) :99
6Lakshmy R, et al. Iodine metabolium in responss to goirogen induced altered thyroid status under conditions of moderate and high intake of iodine. Horm Metab Res 1995 ;27 (1): 450