However, a secondary analysis identified, after adjustment by age group, a statistical trend towards shorter sleep duration in seropositive men [ 18 ].
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Toxoplasma gondii infection and insomnia: A case control seroprevalence study.
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Information about the secondary analysis (reference 18) that showed a trend toward shorter sleep duration in seropositive men was added in the Discussion section (lines 201-203). 10.