MASP2 and rheumatoid arthritis: In a study with RA patients from Brazil, two MASP2 haplotypes CCTGGCCCC (rs7548559(C) + rs61735600(C) + rs72550870(T) + rs56392418(G) + rs17409276(G) + rs12711521(C) + rs2273346(C) + rs12085877(C) + rs1782455(C)), CCTGGACCC (rs7548559(C) + rs61735600(C) + rs72550870(T) + rs56392418(G) + rs17409276(G) + rs12711521(A) + rs2273346(C) + rs12085877(C) + rs1782455(C)) up‐regulated susceptibility to RA, and allele T of rs72550870, allele C of rs12085877 correlated with articular symptoms in RA patients.19