PMC:7347402 / 29368-29403
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T272","span":{"begin":11,"end":14},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"}],"text":"This study has several limitations."}
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T251","span":{"begin":0,"end":35},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"This study has several limitations."}
LitCovid-PMC-OGER-BB
{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T201","span":{"begin":5,"end":10},"obj":"SP_7"}],"text":"This study has several limitations."}