B. del Pozo-Cruz, J. . A. Parraca, J. del Pozo-Cruz, J. . C. Adsuar, J. C. Hill, and N. Gusi, “An occupational, internet-based intervention to prevent chronicity in subacute lower back pain: A randomised controlled trial”, JRM, vol. 44, no. 7, pp. 581–587, May 2012.