References

1. Bicycle Helmet Safety Institute. The History of Bicycle Helmets. 2000. The History of Bicycle Helmets. 2000.

2. CDC. Head injuries associated with motorcycle use--Wisconsin, 1991. MMWR Morb Mortal Wkly Rep. Jun 17 1994;43(23):423, 429-31. [Medline].

3. GAO. Highway Safety. Motorcycle Helmet Laws Save Lives and Reduce Costs to Society. Washington, DC: US General Accounting Office; 1991.

4. Thompson RS, Rivara FP, Thompson DC. A case-control study of the effectiveness of bicycle safety helmets. N Engl J Med. May 25 1989;320(21):1361-7. [Medline].

5. Van Camp LA, Vanderschot PM, Sabbe MB, et al. The effect of helmets on the incidence and severity of head and cervical spine injuries in motorcycle and moped accident victims: a prospective analysis based on emergency department and trauma centre data. Eur J Emerg Med. Jun 1998;5(2):207-11. [Medline].