RT Journal Article SR Electronic T1 Sledging in childhood: just harmless fun? JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 538 OP 539 DO 10.1136/emj.20.6.538 VO 20 IS 6 A1 J G Cooper A1 J S Thomson A1 A J Cooper YR 2003 UL http://emj.bmj.com/content/20/6/538.abstract AB