PMC:7574920 / 27887-28034 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T247","span":{"begin":18,"end":24},"obj":"http://purl.obolibrary.org/obo/UBERON_0000473"},{"id":"T248","span":{"begin":143,"end":146},"obj":"http://purl.obolibrary.org/obo/CLO_0001387"}],"text":"Many samples were tested twice but using aliquots withdrawn at different time points (usually within 24 hours) from the swab samples stored at 4°C."}

{"project":"LitCovid-sentences","denotations":[{"id":"T202","span":{"begin":0,"end":147},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Many samples were tested twice but using aliquots withdrawn at different time points (usually within 24 hours) from the swab samples stored at 4°C."}