Methods Genotypes of HLA DM were determined by PCR RFLP.The relationship of HLA DM genetic polymorphisms with SLE was analysed by case control study.

• 方法用多聚酶链反应-限制性片断长度多态性(PCR-RFLP)确定DM的基因型,用病例对照研究的方法探索DM与SLE的关联性。