Table 1.

Genotyped polymorphisms.

Polymorphism/Gene	NCBI accession number	Genotyping protocol
DRD2/ANKK1 TaqIA	rs1800497	Richter et al., 2013
		Primers for PCR:
		5′-CCGTCGACGGCTGGCCAAGTTGTCTA-3′
		5′-CCGTCGACCCTTCCTGAGTGTCATCA-3′
		Restriction enzyme: TaqI
COMT Val108/158 Met	rs4680	Schott et al., 2006; Wimber et al., 2011
		Primers for PCR:
		5′-ATGGCCCGCCTGCTGTCACCAG-3′
		5′-TCTGACAACGGGTCAGGCACGCACAC-3′
		Restriction enzyme: Hin1ll (NlaIII)
DAT1 VNTR	rs28363170	Schott et al., 2006
		Primers for PCR:
		5′-TGTGGTGTAGGAAACGGCCTGAG-3′
		5′-CTTCCTGGAGGTCACGGCTCAAAGG-3′
		PCR products were not digested
DRD2 C957T	rs6277	Kompetitive allele-specific PCR (KASP)
		Assay on Demand (LGC Genomics, Berlin, Germany)
DARPP-32	rs907094	Primers for PCR:
		5′-GCACCCCATGGAGCGAGAAGACAG-3′
		5′-CGCATTGCTGAGTCTCACCTGCAGTC-3′
		Restriction enzyme: Tru1l