A multicentre, randomised controlled trial to compare the clinical and cost-effectiveness of Lee Silverman Voice Treatment versus standard NHS Speech and Language Therapy versus co... oleh C. M. Sackley, C. Rick, P. Au, M. C. Brady, G. Beaton, C. Burton, M. Caulfield, S. Dickson, F. Dowling, M. Hughes, N. Ives, S. Jowett, P. Masterson-Algar, A. Nicoll, S. Patel, C. H. Smith, R. Woolley, C. E. Clarke, on behalf of the PD COMM Collaborative Group