10.1371/journal.pone.0108896.g001 Jin-Ming Shen Jin-Ming Shen Lei Feng Lei Feng Chun Feng Chun Feng Flow chart of study selection for meta-analysis of mtDNA haplogroups and risk of OA. Public Library of Science 2014 cluster TJ association oa mtDNA haplogroup J hv Different Geographic Populations nos UK population ci CNKI Subgroup analysis ku mtDNA haplogroups Spain population SDOS correlation 2014-10-23 16:37:33 Figure https://plos.figshare.com/articles/figure/_Flow_chart_of_study_selection_for_meta_analysis_of_mtDNA_haplogroups_and_risk_of_OA_/1219715 <p>Flow chart of study selection for meta-analysis of mtDNA haplogroups and risk of OA.</p>