PMC:7019868 / 16961-17051 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T174","span":{"begin":9,"end":16},"obj":"http://purl.obolibrary.org/obo/SO_0000418"}],"text":"Positive signals were visualized under an inverted light microscope (Nikon, Tokyo, Japan)."}

{"project":"LitCovid-sentences","denotations":[{"id":"T121","span":{"begin":0,"end":90},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Positive signals were visualized under an inverted light microscope (Nikon, Tokyo, Japan)."}