Further observations on London fog.
D000397:Air Pollution / Q000009:adverse effects*; D001991:Bronchitis / Q000453:epidemiology*; D004646:Emphysema / Q000453:epidemiology*; D006801:Humans; D008131:London; D011656:Pulmonary Emphysema; D014887:Weather
AIR POLLUTION/injurious effects; BRONCHITIS/epidemiology; EMPHYSEMA/epidemiology