PMC:7796111 / 64840-64876
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T462","span":{"begin":0,"end":36},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Year of study First year 69 (69.7)"}