| http://www.w3.org/ns/prov#value | - Schools were sampled independently in each year, so the potential existed that schools might be included in the samples in both years, particularly in light of the increased sample size in the follow-up survey; 63 schools sampled for follow-up (13%) were also in the baseline sample.Interview instrumentThe interview focused on a wide range of knowledge, health behaviors, attitudes, and beliefs rele
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