Attenuation Levels of Lung Fields in Quantitative Computed Tomography Evaluation Are Associated With Overall Survival and the Incidence of Acute Exacerbation in Combined Pulmonary Fibrosis and Emphysema: A Single‐Center Retrospective Observational Study - Yusuke Suzuki; Yoshiaki Kitaguchi; Takumi Kinjo; Norihiko Goto; Masamichi Komatsu; Fumika Ueno; Yosuke Wada; Atsuhito Ushiki; Masanori Yasuo; Kiyoyasu Fukushima; Masayuki Hanaoka (Health Science Reports, 2026)