2-dG	2-deoxy-guanosine
8-OHdG	8-hydroxydeoxyguanosine
CE-LC/MS	capillary electrophoresis/liquid chromatography mass-spectrometry
CSF	cerebrospinal fluid
GC	gas chromatography
IQR	interquartile range
LC-MS	liquid chromatography-mass spectrometry
LLOQ	lower limit of quantification
LQ	lower quartile
Max	maximum
Min	minimum
MS	mass spectrometry
PD	Parkinson’s disease
SD	standard deviation
SE	standard error
UQ	upper quartile