title: Loneliness: measuring the abstract.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006760:Hospitalization; D006801:Humans; D008132:Loneliness; D008875:Middle Aged; D012107:Research Design; D012494:Sampling Studies; D012934:Social Isolation; D011795:Surveys and Questionnaires