Grosset, D, Taurah, L, Burn, DJ, MacMahon, D, Forbes, A, Turner, K, Bowron, A, Walker, R, Findley, L, Foster, O, Patel, K, Clough, C, Castleton, B, Smith, S, Carey, G, Murphy, T, Hill, J, Brechany, U, McGee, P, Reading, S, Brand, G
, Kelly, L, Breen, K, Ford, S, Baker, M, Williams, A, Hearne, J, Qizilbash, N & Ray Chaudhuri, K 2007, '
A multicentre longitudinal observational study of changes in self reported health status in people with Parkinson's disease left untreated at diagnosis',
Journal of Neurology, Neurosurgery and Psychiatry.
https://doi.org/10.1136/jnnp.2006.098327