1. Report to Secretary of State for Social Services;on Back Pain, Working Group,1979
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3. Controlled trial of mobilisation and manipulation for low back pain: hospital patients;Sims-Williams, H.; Jayson, M.I.V.; Young, S.M.S.; Baddeley, H.; Collins, E.;Br Med J,1979
4. Multicentre trial of physiotherapy in the management of sciatic symptoms;Coxhead, C.E.; Inskip, H.; Meade, T.W.; North, W.R.S.; Troup, J.D.G.;Lancet,1981
5. Sequential treatment assignment with balancing for prognostic factors in the controlled clinical trial;Pocock, S.J.; Simon, R.;Biometrics,1975