RT期刊文章SR电子T1 ACE-2 expression in the small airway epithelia of smokers and COPD patients: implications for COVID-19 JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2000688 DO 10.1183/13993003.00688-2020 VO 55 IS 5 A1 Leung, Janice M. A1 Yang, Chen X. A1 Tam, Anthony A1 Shaipanich, Tawimas A1 Hackett, Tillie-Louise A1 Singhera, Gurpreet K. A1 Dorscheid, Delbert R. A1 Sin, Don D. YR 2020 UL //www.qdcxjkg.com/content/55/5/2000688.abstract AB