RT Article T1 Trends in use and perceptions of nicotine vaping among US youth from 2017 to 2020 JF JAMA pediatrics VO 175 IS 2 SP 185 OP 190 A1 Miech, Richard A2 Barrington-Trimis, Jessica A2 Patrick, Megan E. A2 O'Malley, Patrick M. A2 Johnston, Lloyd D. A2 Leventhal, Adam LA English YR 2021 UL https://krimdok.uni-tuebingen.de/Record/1912730367 DO 10.1001/jamapediatrics.2020.5667