| http://www.w3.org/ns/prov#value | - The authors say: ???Smoking babies tend to come from poorer homes, which may have smaller rooms and inadequate heating. ???Higher cotinine levels in colder times of year may be a reflection of the other key factors which influence exposure to passive smoking, such as poorer ventilation or a greater tendency for parents to smoke indoors in winter.??? Sleeping with a parent is a know risk factor for
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