RT Journal Article SR Electronic T1 Limitations of travel data for rate computations JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP e153 OP e153 DO 10.1136/injuryprev-2014-041177 VO 21 IS e1 A1 Clare E Guse A1 Steven Hargarten YR 2015 UL http://injuryprevention.bmj.com/content/21/e1/e153.abstract AB