Subjects: COLLEGE students; ELECTRONIC cigarettes; CONFIDENCE intervalsEUROPE
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Subjects: WORLD Health Organization; ONLINE information services; PSYCHOLOGY information storage & retrieval systems
Subjects: AGE distribution; CONFIDENCE intervals; SEX distributionENGLAND
Subjects: PUBLIC health surveillance; ELECTRONIC cigarettes; AGE distributionUNITED States
Subjects: HEALTH surveys; RESEARCH methodology; ELECTRONIC cigarettesAUSTRALIA; CANADA; UNITED States
Subjects: SMOKING cessation; ELECTRONIC cigarettes; NICOTINE addictionUNITED States
Subjects: BUPROPION; VARENICLINE; AGE distributionENGLAND
Subjects: TUMOR risk factors; SMOKING; AGE distributionUNITED Kingdom
Subjects: ELECTRONIC cigarettes; EUROPEANS; SMOKING