PMC:7003341 / 66445-66561 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T454","span":{"begin":13,"end":14},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"NIV provides a certain positive pressure ventilation effect through the positive pressure formed by the closed mask."}

{"project":"LitCovid-sentences","denotations":[{"id":"T526","span":{"begin":0,"end":116},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"NIV provides a certain positive pressure ventilation effect through the positive pressure formed by the closed mask."}