| http://www.w3.org/ns/prov#value | - , farmers, unclassifiable and students, as well as a reference group of office workers for comparison.After adjusting for age, body mass index, allergy and hypersensitivities, smoking, medication and pets, there was a slightly higher risk -- about 11 percent -- for asthma in children when their pregnant mothers were exposed to particles of both low molecular weight and high molecular weight.The
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