[1] Univ New S Wales, Sch Aviat, Sydney, NSW 2052, Australia
[2] Univ New S Wales, NSW Injury Risk Management Res Ctr, Sydney, NSW 2052, Australia
[3] Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia
[4] Univ Sydney, Sch Publ Hlth, Sydney, NSW 2006, Australia
[5] Surf Life Saving Australia, Sydney, NSW, Australia