Graphic News] More nicotine in e cigarettes than packs say The Korea Herald South Korea Moves to Tighten Regulations on E Cigarette Devices Amid Youth Smoking Concerns Be Korea savvy South Korean Bill proposed to mandate anti smoking warnings on e cigarettes The Straits Times Trends in socioeconomic inequality in e cigarette use among adolescents in South Korea Korea to regulate e cigarettes by classifying them as tobacco products The Korea Herald James Prieger E CIGARETTES AND SMOKING: CORRELATION, CAUSATION, AND SELECTION BIAS