P. D. Loprinzi, Cardinal, B. J., Crespo, C. J., Brodowicz, G. R., Andersen, R. E., and Smit, E.,
“Differences in demographic, behavioral, and biological variables between those with valid and invalid accelerometry data: implications for generalizability.”,
Journal of physical activity & health, vol. 10, no. 1, pp. 79-84, 2013.