PMC:7095437 / 29953-29971
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T246","span":{"begin":0,"end":18},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"•Multicenter study"}