Divergence of cognitive prognosis and susceptibility variants in Parkinson's disease

CamPaIGN: Roger Barker, Tom Foltynie, Caroline Williams-Gray, Trevor Robbins, Carol Brayne, Sarah Mason, Sophie Winder-Rhodes contributed to the design and running of the trial as well as the recruitment and assessment of patients and DNA sample collection and preparation. Ruwani Wijeyekoon contributed to DNA sample preparation. The CamPaIGN study was sponsored by the University of Cambridge UK and has received funding from the Wellcome Trust, the Medical Research Council, the Patrick Berthoud Trust, and the NIHR Cambridge Biomedical Research Centre.