![Risk Factors in Chronic Obstructive Pulmonary Malfunction and "Chronic Bronchitis" Symptoms in Beijing District: A Joint Study between Japan and China]()
Risk Factors in Chronic Obstructive Pulmonary Malfunction and "Chronic Bronchitis" Symptoms in Beijing District: A Joint Study between Japan and ChinaSeiya Yamaguchi, Katsumi Kano, Nobuhiro Shimojo, Kenichi Sano, Xiping Xu, Hirokatsu Watanabe, Masaaki Kameyama, Maria Jose Santamaria, Shijie Liu, Lihua Wang, Yude Chen, Wenzhi Song, Fusheng Ma and Lin Lu · Journal of Epidemiology and Community Health (1979-) · 1989