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Cotinine, however, has a much longer half-life and remains detectable for several days after use
1998 Mar 1;147(5):488-92.

A comparison of weight gain using both continuous and point prevalence abstinence

The drinking behaviour of parents, carers and other family members is a strong influence on their childrens alcohol use and a family history of alcoholism is associated with an increased risk of alcoholism in children 15

Smoking the least are Hispanics (17%) and Asians (12%) (MMWR 2003;52[40];953956)
