Environmental risk factors over three age intervals; 0–5 years, 6–10 years and 11–18 years.
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*OR odds ratio adjusted for age at study enrolment, ethnicity and gender, and 95% confidence interval. Subjects who responded ‘do not know’ were excluded from analysis.Environmental risk factors over three age intervals; 0–5 years, 6–10 years and 11–18 years.
创建时间：
2015-12-02
