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The aim of this study was to determine whether genetic polymorphisms in programmed
cell death 1 (PDCD1 or PD1) are associated with susceptibility to rheumatoid arthritis
(RA), ankylosing spondylitis (AS), and type 1 diabetes (T1D).
Division of Rheumatology, Department of Internal Medicine, Korea University Anam Hospital,
Korea University College of Medicine, 126-1, Anam-dong 5 ga, Seongbuk-gu, 136-705,
Seoul, Korea, email@example.com.