Of these 33 articles, 4 articles reported on different countries,[11,17,27,34] 2 articles reported on different ethnicities,[31,42] 4 articles reported on different types of systemic scleroses or idiopathic inflammatory myopathies,[24,27,35,44] and 13 articles reported on different sites of BLK polymorphisms[11,20,23–25,27,28,33,36,38,41–43] and were treated as independent studies. This evidence concerns the gene BLK and idiopathic inflammatory myopathy.