PMC:7786642 / 7929-8092 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T68","span":{"begin":0,"end":163},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The PCM model is calibrated using monitoring stations across the nation and has high predictive accuracy, R2 = 0.88 for NO2 and R2 = 0.63 for PM2.5 (Brookes 2017)."}