RT Journal Article SR Electronic T1 Tobacco use down among U.S. youth, but still a major concern JF The Nation's Health JO Nations Health FD American Public Health Association SP 6 OP 6 VO 42 IS 8 A1 Donya Currie YR 2012 UL http://www.thenationshealth.org/content/42/8/6.2.abstract AB