Latent Classes of Young Adults Based on Use of Multiple Types of Tobacco and Nicotine Products.Published in:Nicotine & Tobacco Research, 2014, v. 16, n. 8, p. 1056, doi. 10.1093/ntr/ntu024By:Erickson, Darin J.;Lenk, Kathleen M.;Forster, Jean L.Publication type:Article