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Keyword
cigar
1
cigarette
1
cigarette smoking
1
cigarillo
1
cobalt
1
cocaine
1
college couples
1
college student
1
concurrent tobacco use
1
condom use
1
congenital diaphragmatic hernia
1
copper
1
crack cocaine
1
culture
1
daily smokers
1
distraction
1
domestic tourism
1
drinking
1
drug
1
drugs
1