SLC6A3 and drug-induced dyskinesia: Correlation analyses with molecular imaging–derived neurotransmitter maps identified significant relationships of the brain map of dyskinesia-related grey matter alterations with dopaminergic neurotransmitter systems [(receptor/transporter, rs, P-value) D1: rs = 0.345, P = 0.005; DAT: rs = 0.334, P = 0.006; Fig. 1B].