PMC:7335697 / 8687-8789
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T71","span":{"begin":0,"end":102},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Among 19 centres from seven European countries involved in the study, 12 registered at least one case."}