https://pubmed.ncbi.nlm.nih.gov/?term=resuscitation+orders[mh]+OR+((resuscitation+order*[tw]+OR+%E2%80%9Dnot+for+resuscitation%E2%80%9D[tw]+OR+%E2%80%9Ddo+not+resuscitate%E2%80%9D[tw])+NOT+Medline[sb])+AND+English[la]AND+(systematic[sb]+OR+((clinical[tiab]+AND+trial[tiab])+OR+clinical+trial[pt]+OR+random*[tiab]+OR+random+allocation[mh]+OR+therapeutic+use[sh]))