PMC:7796291 / 12770-12836
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T113","span":{"begin":0,"end":66},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"A) had an additional stiffener web and 2 layers of meltblown webs."}