We enrolled children 5 through 11 years of age in whom asthma had been diagnosed by a physician at research centers in the Bronx, New York; Boston; Chicago; Dallas; New York City; the Seattle and Tacoma, Washington, area; and Tucson, Arizona.
We enrolled children 5 through 11 years of age in whom asthma had been diagnosed by a physicianat research centers in the Bronx, New York; Boston; Chicago; Dallas; New York City; the Seattle and Tacoma, Washington, area; and Tucson, Arizona.