One in four teens who vape say they've used e-cigarettes for an alternative technique known as "dripping," new research finds.
원문출처 : http://www.cnn.com/2017/02/06/health/dripping-e-cigarettes-teens-study/index.html
원문출처 : http://www.cnn.com/2017/02/06/health/dripping-e-cigarettes-teens-study/index.html