Placebo
OtherPlacebo patches of 2, 4, 6 & 8 mg / 24 hours Daily application of Placebo patches starting at 2 mg / 24 hours (early Parkinson's Disease (PD) patients) or 4 mg / 24 hours (advanced PD patients). Dose was up-titrated in weekly increments of 2 mg / 24 hours until optimal or maximal dose was reached. Maximal dose was 8 mg / 24 hours for early PD patients and 16 mg / 24 hours for advanced PD patients.
Optimal or maximal dose was maintained for 12 weeks followed by a de-escalation by 2 mg / 24 hours every other day.