PMC:7795972 / 9882-9932
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T81","span":{"begin":0,"end":4},"obj":"Sentence"},{"id":"T82","span":{"begin":5,"end":50},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"3.1. Demographic Characteristics of the Population"}