Parkinson Study Group

Disease Progression and Pharmacodynamics in Parkinson Disease – Evidence for Functional Protection with Levodopa and Other Treatments

J. Nutt, K. Kieburtz, I. Shoulson, 2006, Journal of Pharmacokinetics and Pharmacodynamics.

Entacapone improves motor fluctuations in levodopa‐ treated Parkinson's disease patients

Parkinson Study Group, Dr Kieburtz, P. Group, 1997, Annals of neurology.