Footnotes

• Handling editor Karim M Khan

• Contributors SB developed this content. AD and CFF provided important feedback on intellectual content.

• Funding This study was funded by a National Health and Medical Research Council (NHMRC) Partnership Project Grant (ID 565907) with additional support (in cash and in kind) from the project partner agencies: the AustralianFootball League (AFL); Victorian Health Promotion Foundation (VicHealth); NSW Sporting Injuries Committee (NSWSIC); JLT Sport, a division of Jardine Lloyd Thompson, Australia; the Department of Planning and Community Development; Sport and Recreation Victoria Division (SRV) and Sports Medicine Australia National and Victorian Branches (SMA). AD’s salary was funded by this research grant. CFF was supported by an NHMRC Principal Research Fellowship (ID1058737). BJG was supported by an NHMRC Career Development Fellowship (ID1048731). JC was supported by an NHMRC practitioner fellowship (ID058493). The Australian Centre for Research into Injury in Sport and its Prevention (ACRISP) is one of the International Research Centres for the Prevention of Injury and Protection of Athlete Health supported by the International Olympic Committee (IOC).

• Competing interests None declared.

• Patient consent None.

• Provenance and peer review Not commissioned; internally peer reviewed.