00476nas a2200145   4500000000100000000000100001008004100002100001900043700001400062700001600076245018800092300001100280490000700291022003200298       2007                            d1 aA. Nightingale1 aR. Farmer1 aC. de Vries00aSystemic lupus erythematosus prevalence in the UK: methodological issues when using the General Practice Research Database to estimate frequency of chronic relapsing-remitting disease  a144-510 v16  a1053-8569 (Print) 1053-8569