PMC:7795888 / 21748-21835
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T132","span":{"begin":0,"end":87},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"First, the study was carried out throughout four days and lacks longitudinal follow-up."}