Characteristics of participants at ages 1 and 3 years.
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Values are reported as number (%) or mean (SD).*By DNA testing available for 584 subjects (292 twin pairs)); prevalence per parental report for 678 subjects at 1yo was the same (240 (35.4%)).∧Defined as cigarette smoke exposure ≥2 times/week in first year of life.
创建时间：
2015-12-02
