Perception of death.
D000328:Adult; D000367:Age Factors; D001290:Attitude; D002675:Child, Preschool; D003643:Death; D003674:Defense Mechanisms; D004644:Emotions; D005239:Fear; D006331:Heart Diseases; D006801:Humans; D008875:Middle Aged; D009369:Neoplasms; D010465:Perception; D011153:Population; D012959:Socioeconomic Factors