PMC:7017878 / 481-605 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T8","span":{"begin":6,"end":122},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"thods\nResidents in rural communities of Yunnan, Guangxi and Guangdong provinces were recruited and enrolled in this study. D"}