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- Marijuana -- Physiological effect[remove]21
- Marijuana5
- Physiological effect5
- Ask Gary4
- Drugged driving4
- Drug abuse3
- Brain -- Effect of drugs on2
- Marijuana -- Law and legislation2
- Automobile drivers -- Drug use1
- Chromosomes -- Effect of drugs on1
- Dr. Jill answers1
- Drug abuse -- Genetic aspects1
- Drug abuse -- Psychological aspects1
- Drug addicts1
- Drug use1
- Editorial1
- Etiology1
- Fetus -- Abnormalities1
- Habit -- Physiological effect1
- Habit breaking1