Authors’ contributions
Conception and design: GL Z, ZX L; Administrative support: ZX L, J L; Bronchoscopy and bronchoscopic figures: CJ W, GL Z; Provision of study materials or patients: ZL W, XY T, YY L, QY L, XJ X; Imaging and pathological figures: H D, J Z; Manuscript writing: GL Z, ZX L; Final approval of manuscript: All authors