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Padyukov, Leonid, Mark Seielstad, Rick T H. Ong, Bo Ding, Johan Rönnelid, Maria Seddighzadeh, Lars Alfredsson, and Lars Klareskog. A Genome-wide Association Study Suggests Contrasting Associations in ACPA-positive Versus ACPA-negative Rheumatoid Arthritis. BMJ Group, 2010.

Padyukov, Leonid, et al. A Genome-wide Association Study Suggests Contrasting Associations in ACPA-positive Versus ACPA-negative Rheumatoid Arthritis. BMJ Group, 2010.