COVID-19 Intubation advance directives &#x7C; {Setting} &#x7C; Document ontology
covid-19 intubation advance directives &#x7c; {setting} &#x7c; document ontology
COVID-19 Intubation advance directives &#x7C; {Setting} &#x7C; Document ontology
covid-19 intubation advance directives &#x7c; {setting} &#x7c; document ontology