Three Canadian researchers have shown that left-handedness is more common in gay men and in lesbian women than in comparable heterosexual persons. Drs. Martin L. Lalumière, Ray Blanchard, and Kenneth J. Zucker, of the Centre for Addiction and Mental Health (CAMH) and the University of Toronto, reached this conclusion by means of a meta-analysis -- a statistical technique for combining the results of many previous studies in order to reach a reliable conclusion.
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