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REFERENCES 1.  IRFU. Irish Rugby Football Union Annual Report: Making History. Dublin 2007. 2. Makdissi M, Darby D, Maruff P, Ugoni A, Brukner P, McCrory PR. Natural history of concussion

in sport: markers of severity and implications for management. Am J Sports Med. Mar 2010;38(3):464-471.

3. Makdissi M, McCrory P, Ugoni A, Darby D, Brukner P. A prospective study of postconcussive outcomes after return to play in Australian football. Am J Sports Med. May 2009;37(5):877-883.

4. Marshall SW, Loomis DP, Waller AE, et al. Evaluation of protective equipment for prevention of injuries in rugby union. Int J Epidemiol. Feb 2005;34(1):113-118.

5. Marshall SW, Spencer RJ. Concussion in Rugby: The hidden epidemic. J Athl Train. Sep 2001;36(3):334-338.

6.  IRB Concussion guidelines. May, 2011. 7.  Broglio SP, Vagnozzi R, Sabin M, Signoretti S, Tavazzi B, Lazzarino G. Concussion occurrence

and knowledge in Italian football (soccer). J Sports Sci Med. 2010;9:418-430. 8. McCrea M, Hammeke T, Olsen C, Leo P, Guskiewicz K. Unreported concussion in high school

football players: Implications for prevention. Clin J Sports Med. 2004;14:13-17.

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