PMC:7558233 / 44821-44823
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T274","span":{"begin":0,"end":2},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"\u2028\u2028"}