PMC:7463108 / 52-144
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T2","span":{"begin":15,"end":23},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" Perspectives\n\nAbstract\nWith the current national opioid crisis, it is critical to examine t"}