High diagnostic yield and treatment impact of bronchoscopy in elderly lung cancer patients (≥ 80 years): A single-center retrospective study. - Maeda S; Ina T; Ota A; Matsunaga M; Horiguchi T; Ikeda A; Moriya R; Sato T; Sawada C; Oya Y; Okachi S; Goto Y; et al. (Respiratory investigation, 2026)