作者单位:Cone Hlth Med Grp, LeBauer Pulm, Greensboro, NC USA[1]Donald & Barbara Zucker Sch Med Hofstra Northwell, Hempstead, NY USA[2]SUNY Upstate Med Univ, Crouse Hlth, Syracuse, NY 13210 USA[3]Boston Med Ctr, Pulm & Crit Care, Boston, MA USA[4]Univ Chicago, Sect Pulm & Crit Care Intervent Pulmonol, Dept Med, Chicago, IL 60637 USA[5]