title: Responders: levels and logic of respirators.
authors.forename: B G
authors.initials: BG
authors.lastname: Phillips
authors.forename: D
authors.initials: D
authors.lastname: Browner
mesh_terms: D004630:Emergencies; D015386:Hazardous Substances; D006801:Humans; D016272:Occupational Health; D012134:Respiratory Protective Devices / Q000592:standards
chemical_list: D015386:Hazardous Substances