Algorithms / Pediatrics / Asthma / Vietnam / Cultural Diversity / California / Humans / Child / Female / Male / Elementary School / Medical Care / Socioeconomic Status / Questionnaires / Ethnic Group / Physical examination / Reproducibility of Results / European Continental Ancestry Group / Urban Population / Bronchial Asthma / Sensitivity and Specificity / National Institute of Health / Predictive value of tests / California / Humans / Child / Female / Male / Elementary School / Medical Care / Socioeconomic Status / Questionnaires / Ethnic Group / Physical examination / Reproducibility of Results / European Continental Ancestry Group / Urban Population / Bronchial Asthma / Sensitivity and Specificity / National Institute of Health / Predictive value of tests