PMC:7143707 / 14651-14730
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T125","span":{"begin":0,"end":79},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"21 https://www.cdc.gov/niosh/npptl/topics/respirators/factsheets/respsars.html"}