PT - JOURNAL ARTICLE AU - Un Jung Kang AU - Tao Xie TI - Diagnostic biomarkers of Parkinson's disease: what gain at what cost? AID - 10.1136/jnnp-2012-302529 DP - 2012 Aug 01 TA - Journal of Neurology, Neurosurgery & Psychiatry PG - 769--769 VI - 83 IP - 8 4099 - http://jnnp.bmj.com/content/83/8/769.short 4100 - http://jnnp.bmj.com/content/83/8/769.full SO - J Neurol Neurosurg Psychiatry2012 Aug 01; 83