Genetic factors 90.00% 同卵双生发病率 80.00% 70.00% 系统性红斑狼疮 60.00% 50.00% 40.00% 近亲发病率 30.00% 一般发病率 异卵双生发病率 20.00% 10.00% 0.00% general Close fraternal monozygotic population relatives twins twins 0.7% 5%-12% 3%-9% 24%-57%