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18.1 During the past 12 months have you had unusual tiredness, fatigue, 1.Yes ___ 0.No ___ or drowsiness? IF YES: 18.2 Have you had unusual tiredness, fatigue, or drowsiness one or 1.Yes ___ 0.No ___ more times per week in the last 4 weeks? 18.3 When you were away from the building was the unusual tiredness, ................
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