RT Journal Article SR Electronic T1 Risk homeostasis theory: an overview JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 89 OP 91 DO 10.1136/ip.4.2.89 VO 4 IS 2 A1 Gerald J S Wilde YR 1998 UL http://injuryprevention.bmj.com/content/4/2/89.abstract AB