The document discusses the Parkinson's Progression Markers Initiative (PPMI), a public-private partnership aiming to accelerate Parkinson's disease drug development. PPMI is conducting a large clinical study to identify biomarkers that can complement current clinical measures and help overcome challenges in PD therapy testing. It has recruited over 600 subjects across sites in the US, Europe, and soon Australia. Industry partners provide input while data is standardized, shared in real-time, and made widely available to support more efficient drug development.