PMC:7117791 / 4703-4886 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T19","span":{"begin":11,"end":18},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"},{"id":"T20","span":{"begin":50,"end":57},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"}],"text":"Ultrasonic devices are high frequency oscillating devices which may hypothetically add to the potential risk although the magnitude of any such risks are unknown (Zheng et al., 2020)."}

{"project":"LitCovid-sentences","denotations":[{"id":"T29","span":{"begin":0,"end":183},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Ultrasonic devices are high frequency oscillating devices which may hypothetically add to the potential risk although the magnitude of any such risks are unknown (Zheng et al., 2020)."}