00355nas a2200121   4500000000100000008004100001100001600042700001300058700001200071245013100083300001100214490000800225       2013                            d1 aCurtis Kate1 aIvers R.1 aDinh M.00aThe effectiveness of helmets in reducing head injuries and hospital treatment costs in Sydney, Australia. A multicentre study.  a415-7 0 v198