RT Journal Article SR Electronic T1 Association between schizophrenia and homozygosity at the dopamine D3 receptor gene. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 858 OP 860 DO 10.1136/jmg.29.12.858 VO 29 IS 12 A1 Crocq, M A A1 Mant, R A1 Asherson, P A1 Williams, J A1 Hode, Y A1 Mayerova, A A1 Collier, D A1 Lannfelt, L A1 Sokoloff, P A1 Schwartz, J C YR 1992 UL http://jmg.bmj.com/content/29/12/858.abstract AB Disturbances in dopamine neurotransmission have been postulated to underlie schizophrenia. We report data from two independent studies of a BalI polymorphism in the dopamine D3 receptor gene in patients with schizophrenia. In both studies, more patients than controls were homozygous (p = 0.005, p = 0.008). When pooled data were analysed, this difference was highly significant (p = 0.0001) with a relative risk of schizophrenia in homozygotes of 2.61 (95% confidence intervals 1.60-4.26).