PMC:7152911 / 91924-91947
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T751","span":{"begin":2,"end":8},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":". 2007). Further studie"}