PMC:7216275 / 44510-44549
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T376","span":{"begin":0,"end":39},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Fourth, the data were collected online."}