MEDICAL SCIENCES Correction for “Electronic-cigarette smoke induces lung adenocarcinoma and bladder urothelial hyperplasia in mice,” by Moon-shong Tang, Xue-Ru Wu, Hyun-Wook Lee, Yong Xia, Fang-Ming Deng, Andre L. Moreira, Lung-Chi Chen, William C. Huang, and Herbert Lepor, which was first published October 7, 2019; 10.1073/pnas.1911321116 (Proc. Natl. Acad. Sci. U.S.A. 116, 21727–21731).
The authors note that on page 21727, left column, first body paragraph, line 14, “isopropylene” should instead appear as “propylene”; that on page 21728, left column, second full paragraph, line 4, “isopolypropylene” should instead appear as “propylene”; and that on page 21729, in the legend for Fig. 1, line 1, “isopropylene” should instead appear as “propylene.”