PMC:7799378 / 97-113
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T2","span":{"begin":0,"end":2},"obj":"Sentence"},{"id":"T3","span":{"begin":3,"end":5},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"H. C. Yang et al"}