Learn More
BACKGROUND AND OBJECTIVE Our goal was to estimate the time trends in the prevalence of symptoms of allergic rhinitis (AR) and its geographic variations. POPULATION AND METHOD During 2001-2002, the(More)
OBJECTIVE To analyze geographic variations in the prevalence of symptoms related to asthma in Spanish children and adolescents. POPULATION AND METHODS In 2001 and 2002, the Spanish arm of the(More)
  • 1