Incidence, Risk, and Protective Factors of Mild Traumatic Brain Injury in a Cohort of Australian Nonprofessional Male Rugby Players

S. J Hollis, M. R Stevenson, A. S McIntosh, E. A Shores, M. W Collins and C. B. Taylor

The American Journal of Sports Medicine 37 ( 12 ): 2328 - 2333 , 2009