RT Journal Article SR Electronic T1 Gender differences in weight related concerns in early to late adolescence JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 700 OP 701 DO 10.1136/jech.56.9.700 VO 56 IS 9 A1 H Sweeting A1 P West YR 2002 UL http://jech.bmj.com/content/56/9/700.abstract AB