RT Journal Article SR Electronic T1 Ragnar Berfenstam's legacy JF Injury Prevention JO Inj Prev FD BMJ Publishing Group Ltd SP 4 OP 4 DO 10.1136/ip.6.1.4 VO 6 IS 1 A1 Bergman, Abraham B YR 2000 UL http://injuryprevention.bmj.com/content/6/1/4.abstract AB