PMC:7650537 / 7277-7337
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T56","span":{"begin":0,"end":60},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"All sera classified as reactive in the PRNT were considered."}