A Randomized, Double Blind, Placebo Controlled Parallel-Group Fixed and Flexible SLV308 Dose Arm Study to Assess Efficacy and Safety of SLV308 Monotherapy in the Treatment of Patients With Early Stage Parkinson's Disease

This study is a multicenter, randomized, double blind, parallel group study of 6 months' treatment with SLV308 administered as a monotherapy in patients with early stage PD. An open label safety extension to this study is planned as a separate protocol for patients who are willing and eligible to participate.