RT Journal Article SR Electronic T1 No change in sex ratio in Ramsar (north of Iran) with high background of radiation JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 146 OP 147 DO 10.1136/oem.60.2.146-a VO 60 IS 2 A1 M Saadat YR 2003 UL http://oem.bmj.com/content/60/2/146.2.abstract AB