RT期刊文章SR电子T1 f有限的作用or bronchoalveolar lavage to exclude COVID-19 after negative upper respiratory tract swabs: a multicentre study JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 2001733 DO 10.1183/13993003.01733-2020 VO 56 IS 4 A1 Geri, Pietro A1 Salton, Francesco A1 Zuccatosta, Lina A1 Tamburrini, Mario A1 Biolo, Marco A1 Busca, Annalisa A1 Santagiuliana, Mario A1 Zuccon, Umberto A1 Confalonieri, Paola A1 Ruaro, Barbara A1 D'Agaro, Pierlanfranco A1 Gasparini, Stefano A1 Confalonieri, Marco YR 2020 UL //www.qdcxjkg.com/content/56/4/2001733.abstract AB