Lee Silverman Voice Treatment versus standard speech and language therapy versus control in Parkinson’s disease: a pilot randomised controlled trial (PD COMM pilot) door Catherine M. Sackley, Christina H. Smith, Caroline E. Rick, Marian C. Brady, Natalie Ives, Smitaa Patel, Rebecca Woolley, Francis Dowling, Ramilla Patel, Helen Roberts, Sue Jowett, Keith Wheatley, Debbie Kelly, Gina Sands, Carl E. Clarke, on behalf of the PD COMM Pilot Collaborative Group

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