Journal of Rheumatic Diseases

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Fig. 1. Classification according to the Kellgren-Lawrence (K/L) score at each follow-up in the study cohort. The frequencies of mitochondrial DNA haplogroups were analyzed in the non-progression and progression groups (box surrounded by the dotted line).
J Rheum Dis 2020;27:168~173 https://doi.org/10.4078/jrd.2020.27.3.168
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