PMC:7219429 / 5579-5603
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T43","span":{"begin":0,"end":24},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2 Materials and Methods"}