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Proportion of patients consulting their general practitioner for symptoms within each British Isles Lupus Activity Group (BILAG) domain in the 5 years before SLE diagnosis (date of diagnosis between 1 January 2000 and 31 December 2012) by months before SLE diagnosis taking left data truncation into account in the denominator calculations for the 25–36, 37–48 and 49–60 months before diagnosis.
