academic article

• Associations of sleep disturbance symptoms with health-related quality of life in Parkinson's disease..  The Journal of Neuropsychiatry and Clinical Neurosciences.  25:319-26. 2013
• Confirmatory factor analysis of the motor unified Parkinson's disease rating scale..  Parkinson's Disease.  -. 2012
• Medication responsiveness of motor symptoms in a population-based study of Parkinson disease..  Parkinson's Disease.  -. 2011