PMC:7115396 / 16996-17018
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T116","span":{"begin":0,"end":22},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2.8.1 Viral challenge"}