PMC:7796329 / 62617-62671
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T517","span":{"begin":0,"end":54},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Third, the two health variables have opposite effects."}