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These are very popular because of how discreet they are and how easy they are to travel with

"As more products, including cannabis and various e-cigarette devices, enter the market, assessing respiratory health will be important both where adolescents and young adults receive their health care and in research," said Dr

Teenagers are very familiar with the risks of smoking cigarettes, but are much less sure whether marijuana or e-cigarettes are harmful, according to a new study by researchers at the Stanford University School of Medicine

doi: 10.14309/ajg.0000000000000340 51

Piano MR, Benowitz NL, Fitzgerald GA, Corbridge S, Heath J, Hahn E, et al