PMC:7444865 / 16646-16668
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T159","span":{"begin":0,"end":22},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" Sometimes 33.04 1421"}