Yousef AbouHashem1, Manisha Dayal2, Stanley Serafin3, Goran Štrkalj1. 1. Department of Chiropractic, Macquarie University, Sydney, New South Wales, Australia. 2. School of Science and Health, Western Sydney University, Campbelltown, New South Wales, Australia. 3. School of Health, Medical and Applied Sciences, Central Queensland University, Sydney, New South Wales, Australia.