Article Text
Letter
Evaluation of allele frequencies in the PADI4 gene and anti-cyclic citrullinated peptide antibodies of patients with rheumatoid arthritis in a Japanese population
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Footnotes
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Competing interests: None.
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Ethical approval: The Graduate School of Medicine, Chiba University, has approved the protocol for this investigation on humans, and all investigations were conducted in conformity with ethical principles of research.