title: Word-of-mouth communication: causes and consequences.
authors.forename: B
authors.initials: B
authors.lastname: Gelb
authors.forename: M
authors.initials: M
authors.lastname: Johnson
mesh_terms: D000329:Advertising; D003142:Communication; D003258:Consumer Behavior; D006302:Health Services Research; D006801:Humans; D007255:Information Services; D008389:Marketing of Health Services / Q000379:methods*; D008402:Mass Media; D014481:United States