https://pubmed.ncbi.nlm.nih.gov/?term=((adolescen*[ti]+OR+child*[ti]+OR+infan*[ti]+OR+paediatric*[ti]+OR+pediatric*[ti])+OR+((adolesc*[tw]+OR+child*[tw]+OR+infant*[tw]+OR+paediatric*[tw]+OR+pediatric*[tw])+NOT+medline[sb]))+AND+((%E2%80%9Cbereavement%E2%80%9D[mh%3Anoexp]+OR+bereav*[tw]+OR+grief[tw]+OR+grieving[tw]+OR+continuing+bond*[tiab]+OR+spousal+loss[tiab]+OR+complicated+grief[tiab]+or+prolonged+grief[tiab]+AND+medline[sb])+OR+(bereav*[tiab]+OR+grief[tiab]+OR+widow*[tw]+OR+grieving[tiab]+OR+grieve*[tiab]+OR+loss+of+a+child[tiab]+OR+death+of+a+parent[tiab]+OR+continuing+bond*[tiab]+OR+spousal+loss[tiab]+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]))