title: Attachment and loss: retrospect and prospect.
mesh_terms: D001010:Anxiety, Separation / Q000523:psychology; D002648:Child; D002675:Child, Preschool; D003674:Defense Mechanisms; D004532:Ego; D006117:Grief; D006801:Humans; D007223:Infant; D008426:Maternal Deprivation; D009769:Object Attachment; D010553:Personality Development; D012106:Research