PMC:7796111 / 18866-18901
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T129","span":{"begin":0,"end":35},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Mean age was 20.36 years (SD 1.69)."}