PMC:7216275 / 43599-43641
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T369","span":{"begin":0,"end":42},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Research Limitations and Future Directions"}