PMC:7333997 / 15782-15983 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T145","span":{"begin":0,"end":201},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The PM2.5 values are obtained from the online platform (WAQ Index, 2020) and official weather stations of each city, the analyzed information depends on obtaining or recording data from the study date."}