McKay, M. J., Baldwin, J. N., Ferreira, P., Simic, M., Vanicek, N., Hiller, C. E., …on behalf of the 1000 Norms Project Consortium, . (2016). 1000 Norms Project: Protocol of a cross-sectional study cataloging human variation. Physiotherapy, 102(1), 50-56. https://doi.org/10.1016/j.physio.2014.12.002