MASP2 and systemic lupus erythematosus: It is notable that patients with positive anti‐dsDNA antibody had higher frequency of GG as compared to the patients with negative anti‐dsDNA antibody for rs17409276, and patients with positive anti‐dsDNA antibody had higher serum levels of MASP2, suggesting that rs17409276 polymorphism in MASP2 gene may affect MASP2 protein expression and play a role in SLE pathogenesis.