RT Journal Article SR Electronic T1 Effect of cigarette smoking on hearing impairment in Korean adults over 40 years old: based on data from the Korean National Health and Nutrition Examination Survey, 2013 JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 113 OP 113 DO 10.7861/clinmedicine.19-2-s113 VO 19 IS Suppl 2 A1 Yu Rim Lee A1 Jiho Choi A1 Yeon Ji Lee YR 2019 UL http://www.rcpjournals.org/content/19/Suppl_2/113.abstract