Effects of short-term smoking on lung function and airway hyper-responsiveness in young patients with untreated intermittent adult-onset asthma: retrospective cross-sectional study at a primary–tertiary care hospital in Japan
BMJ Open 2019;9:e023450. doi: 10.1136/bmjopen-2018-023450 Kentaro Watai, Kiyoshi Sekiya, Hiroaki Hayashi, Yuma Fukutomi, Masami Taniguchi Abstract Objective In daily clinical practice, smokers with asthma and with intermittent disease severity are frequently encountered. The effects of…