Letter: Propellant a factor in asthma deaths?
D000335:Aerosol Propellants / Q000009:adverse effects; D000336:Aerosols / Q000009:adverse effects*; D001249:Asthma / Q000401:mortality*; D004562:Electrocardiography; D006801:Humans
D000335:Aerosol Propellants; D000336:Aerosols