Li – Association of smoking and electronic cigarette use with wheezing and related respiratory symptoms in adults – Tob Control 2020 Association of smoking and electronic cigarette use with wheezing and related respiratory symptoms in adults: cross-sectional results from the Population Assessment of Tobacco and Health (PATH) study, wave 2. Dongmei Li, Isaac K Sundar, Scott McIntosh, Deborah J Ossip, Maciej Lukasz Goniewicz, Richard J O’Connor, Irfan Rahman