(Q39300995)
Statements
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Respiratory symptoms and lung function in habitual heavy smokers of marijuana alone, smokers of marijuana and tobacco, smokers of tobacco alone, and nonsmokers (English)
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Tashkin DP
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Coulson AH
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Clark VA
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Simmons M
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Bourque LB
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Duann S
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Spivey GH
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Gong H
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1 January 1987
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