RT Journal Article SR Electronic T1 Using the Haddon matrix: introducing the third dimension JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 302 OP 307 DO 10.1136/ip.4.4.302 VO 4 IS 4 A1 Carol W Runyan YR 1998 UL http://injuryprevention.bmj.com/content/4/4/302.abstract AB