C. H. Lin, S. Y. Yang, H. E. Horng, C. C. Yang, J. J. Chieh, H. H. Chen, B. H. Liu, and M. J. Chiu,"Plasma α-synuclein predicts cognitive decline in Parkinson's disease", Journal of neurology, neurosurgery, and psychiatry. 0:1–7. doi:10.1136/jnnp-2016-314857. (2017)
http://jnnp.bmj.com/content/early/2017/05/26/jnnp-2016-314857