DETECTION OF ASTHMA EPIDEMICS IN SEVEN CITIES.
D000397:Air Pollution; D001249:Asthma; D002947:Cities; D004219:District of Columbia; D058872:Epidemics; D004813:Epidemiology; D007087:Illinois; D008145:Louisiana; D009518:New York; D010414:Pennsylvania; D014768:Virginia
AIR POLLUTION; ASTHMA; DISTRICT OF COLUMBIA; EPIDEMIOLOGY; ILLINOIS; LOUISIANA; NEW YORK; PENNSYLVANIA; VIRGINIA