FD	Fluorodopa
DRD	Dopamine Responsive Dystonia
PET	Positron Emission Tomography
PD	Parkinson’s Disease
JP	Juvenile Parkinsonism
LD	Levodopa
TDH	Tyrosine Hydroxylase Deficiency
TD	Tyrosine Hydroxylase
SNpc	Substantia Nigra Pars Compacta
EOPD	Early-Onset Parkinson’s Disease
iPD	Idiopathic Parkinson’s Disease
GTP-CH-I	Guanosine Triphosphate-Cyclohydrolase 1
PTP	Pyruvoyltetrahydropterin
PRISMA	Preferred reporting items for systematic reviews and meta-analyses
MOOSE	Meta-analysis of observational studies in epidemiology