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Prospective cohort study.
Two general medical practices, Southampton, UK; December 2000 to March 2001.
803 people, aged >26 years, randomly selected at morning or evening clinics. People unable to speak English were excluded.
Seasonal Pattern Assessment Questionnaire (SPAQ); Seasonal Health Questionnaire (SHQ). Seasonal affective disorder was diagnosed automatically from completed questionnaires according to ICD-10, DSM-III-R, and DSM-IV criteria.
Structured Clinical Interview for …
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