PMC:7463108 / 4457-4668
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T6401","span":{"begin":88,"end":91},"obj":"http://purl.obolibrary.org/obo/CLO_0051582"}],"text":"Khatri and Perrone 2020).\nThe current opioid crisis did not happen quickly; in fact, it has been described as occurring in three phases. The first phase began in the late 1990s with an increase in the number of "}
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T38","span":{"begin":26,"end":136},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Khatri and Perrone 2020).\nThe current opioid crisis did not happen quickly; in fact, it has been described as occurring in three phases. The first phase began in the late 1990s with an increase in the number of "}