When a child needs his parents most.
D002675:Child, Preschool; D005260:Female; D006117:Grief; D006801:Humans; D007938:Leukemia / Q000451:nursing* / Q000523:psychology; D008297:Male; D010287:Parent-Child Relations; D010344:Patient Advocacy; D011368:Professional-Family Relations; D013727:Terminal Care