[1] School of Health Professions (Discipline of Chiropractic) Murdoch University, Perth, WA
[2] Murdoch University Chiropractic Clinic, South Street Campus, 90 South Street, Murdoch, 6150, WA
[3] General Practice and Emergency Medicine Registrar, Busselton, 6160, WA
[4] The University of Western Australia, School of Population Health, Faculty of Medicine, Dentistry and Health Sciences, 35 Stirling Highway (M431), Crawley, Perth, 6009, WA