1. Incidence and underlying etiologies of bronchial secretion in terminally ill cancer patients: a multicenter, prospective, observational study 
Tatsuya Morita, MD, Ichinosuke Hyodo, MD, Taisuke Yoshimi, MD, Masayuki Ikenaga, MD, Yoichiro Tamura, MD, Akitaka Yoshizawa, MD, Akira Shimada, MD, PhD, Tatsuo Akechi, MD, PhD, Isamu Adachi, MD 
Journal of Pain and Symptom Management 
Volume 27, Issue 6, Pages (June 2004)
DOI: /j.jpainsymman

2. Fig. 1 Hypothesized pathophysiology of bronchial secretion.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )