title: Systematic observation of crisis center telephone interactions.
mesh_terms: D001519:Behavior; D003142:Communication; D003201:Computers; D003419:Crisis Intervention; D003463:Cues; D004992:Ethics, Medical; D006801:Humans; D007256:Information Systems; D007398:Interpersonal Relations; D013637:Tape Recording; D013689:Telephone; D013997:Time Factors