Additional local support for BOLD sites was provided by: Boehringer Ingelheim China (Guangzhou, China); the Turkish Thoracic Society, Boehringer-Ingelheim and Pfizer (Adana, Turkey); Altana, Astra-Zeneca, Boehringer-Ingelheim, GlaxoSmithKline, Merck Sharpe [erj.ersjournals.com]

Handa H, Huang J, Murgu SD, Mineshita M, Kurimoto N, et al. (2014) Assessment of central airway obstruction using impulse oscillometry before and after interventional bronchoscopy. Respir Care 59: 231–240. View Article Google Scholar 15. [journals.plos.org]

There is a small left pleural effusion. A CT scan shows a confluent soft tissue mass measuring 20 x 22 mm in the left mainstem bronchus causing complete collapse of the left upper lobe. [clevelandclinicmeded.com]