RT Journal Article SR Electronic T1 Iodine deficiency disorders still prevalent in China JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E151 OP E152 DO 10.1503/cmaj.109-3006 VO 181 IS 8 A1 Katie Lewis YR 2009 UL http://www.cmaj.ca/content/181/8/E151.abstract AB