Objectives: The aim of this study was to investigate the relationship between age at cigarette smoking initiation and smoking level among adolescent current smokers. Methods: In 2007, students from one or two classes of the 10th or 11th grade were randomly selected using the pro...
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Department of Preventive Medicine and Public Health.
Ajou University School of Medicine, 206 World cup-ro, Yeongtong-gu, Suwon 443-749, Republic of Korea
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