PMC:7386785 / 42414-42535 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T79577","span":{"begin":110,"end":120},"obj":"http://purl.obolibrary.org/obo/BFO_0000030"}],"text":"We have listed sources of heterogeneity that we investigated if adequate data were available in the Secondary objectives."}

{"project":"LitCovid-sentences","denotations":[{"id":"T407","span":{"begin":0,"end":121},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"We have listed sources of heterogeneity that we investigated if adequate data were available in the Secondary objectives."}