Bicycle helmets: effective protection.
Parkin
P
P
Hu
X
X
Spence
L
L
Wesson
D
D
D001642:Bicycling; D006259:Craniocerebral Trauma / Q000517:prevention & control; D004867:Equipment Design; D006260:Head Protective Devices; D006688:Hockey; D006801:Humans