TY - RPRT TI - Systemic lupus erythematosus prevalence in the UK: methodological issues when using the General Practice Research Database to estimate frequency of chronic relapsing-remitting disease. AU - A L Nightingale AU - R D T Farmer AU - C S de Vries PY - 2007 DO - 10.1002/pds.1253 UR - https://pubmed.ncbi.nlm.nih.gov/16700093/ ID - 16700093 ER -