RT Journal Article SR Electronic T1 Pednet JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 231 OP 231 DO 10.1136/ip.3.3.231-a VO 3 IS 3 A1 Jacobsen, Peter YR 1997 UL http://injuryprevention.bmj.com/content/3/3/231.2.abstract AB