Peptidyl arginine deiminase type IV (PADI4) haplotypes interact with shared epitope regardless of anti-cyclic citrullinated peptide antibody or erosive joint status in rheumatoid arthritis: a case control study

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So-Young Bang, Tae-Un Han, Chan-Bum Choi, Yoon-Kyoung Sung, Sang-Cheol Bae^* and Changwon Kang^*

* Corresponding authors: Sang-Cheol Bae scbae@hanyang.ac.kr - Changwon Kang ckang@kaist.ac.kr

Arthritis Research & Therapy 2010, 12:R115 doi:10.1186/ar3051