Sixty-eight patients with bipolar affective disorder and 88 controls were investigated for genetic association of tyrosine hydroxylase (TH) restriction fragment length polymorphisms (RFLPs). No significant association between bipolar affective disorder and TH was found. Thus the hypothesis that TH is involved in the pathogenesis of bipolar affective disorder was not supported.
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Inayama et al. (1993) studied this question.
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