%0 Journal Article
%T Butting heads over bicycle helmets
%J CMAJ : Canadian Medical Association journal
%D 2002
%A Kreyes, W.
%V 167
%N 4
%P 337; author reply 338-9
%X Abstract unavailable.
%G 
%I Canadian Medical Association
%@ 0820-3946
%U http://dx.doi.org/