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This is an update request for the document Shared Epitope Alleles Remain A Risk Factor for Anti-Citrullinated Proteins Antibody (ACPA) – Positive Rheumatoid Arthritis in Three Asian Ethnic Groups by Too Chun-Lai, Leonid Padyukov, Jasbir Singh Dhaliwal, Emeli Lundström, Abqariyah Yahya, Nor Asiah Muhamad, Lars Klareskog, Lars Alfredsson, Per Tobias Larsson, Shahnaz Murad and null null

Your paper was deposited in MUCC (Crossref) and appears online at https://doi.org/10.1371/journal.pone.0021069
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