1 Northwest Center for Lifestyle and Functional Medicine, University of Western States, Portland, OR 97230, USA.
2 Australian Research Centre in Complementary and Integrative Medicine (ARCCIM), University of Technology Sydney, Sydney, NSW 2007, Australia.
3 Department of Sports Science and Clinical Biomechanics, Nordic Institute of Chiropractic and Clinical Biomechanics, University of Southern Denmark, 5230 Odense M, Denmark.