A Cohort Study on Self-Reported Respiratory Symptoms of Toner-Handling Workers: Cross-Sectional and Longitudinal Analysis from 2003 to 2008. - Hiroko Kitamura; Niina Terunuma; Shizuka Kurosaki; Koichi Hata; Masashi Masuda; Takeshi Kochi; Nobuaki Yanagi; Tadashi Murase; Akira Ogami; Toshiaki Higashi (BioMed Research International, 2014)