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(A) Forest plot for the meta-analysis of the PTPN22 the R620W (C1858T; rs2476601) polymorphism and limited cutaneous systemic sclerosis subtype, in seven Caucasian cohorts and previous studies. (B) Forest plot for the meta-analysis of the PTPN22 the R620W (C1858T; rs2476601) polymorphism and anticentromere antibody-positive autoantibody status of systemic sclerosis, in seven Caucasian cohorts and previous studies.
