https://pubmed.ncbi.nlm.nih.gov/?term=(euthanasia[mh%3Anoexp]+OR+euthanasia,+passive[mh]+OR+euthanasia,+active[mh%3Anoexp]+OR+euthanasia,+active,+voluntary[mh]+OR+right+to+die[mh])+OR+((euthanasia[tw]+OR+right+to+die[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]))+AND+free+full+text[sb]