Butting heads over bicycle helmets.

Ten years after publishing an article in CMAJ [1][1] about the negative implications of bicycle helmet legislation, I continue to be dumbfounded by the broad consensus within our profession in favour of such laws.[2][2] A fundamental problem with emphasizing and legislating helmet use is that it

[1]  Mary L Chipman.  Hats off (or not?) to helmet legislation. , 2002, CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

[2]  J. Leblanc,et al.  Effect of legislation on the use of bicycle helmets. , 2002, CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

[3]  U Pulkkinen,et al.  An expert judgment model applied to estimating the safety effect of a bicycle facility. , 2000, Accident; analysis and prevention.

[4]  T. J. De Marco.  The use of bicycle helmets should not be mandatory , 1993 .