America's Children and the Environment
In 1997, the NHIS underwent a major redesign in which the questions used to estimate asthma prevalence were ... Respiratory infections are ICD-9 codes 464 and 465, acute bronchitis is ICD-9 code 466, and asthma is ICD-9 code 493.
| Title | : | America's Children and the Environment |
| Author | : | |
| Publisher | : | - 2003 |
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