PMC:7519301 / 20137-20349 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T126","span":{"begin":0,"end":212},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"While there was only limited evidence of diversification at selected sites, we also assessed whether subpopulations among the globally circulating viral population had become genetically differentiated over time."}