Media type: E-Article Title: Improvement in household stoves and risk of chronic obstructive pulmonary disease in Xuanwei, China: retrospective cohort study Contributor: Chapman, Robert S; He, Xingzhou; Blair, Aaron E; Lan, Qing Published: BMJ, 2005 Published in: BMJ, 331 (2005) 7524, Seite 1050 Language: English DOI: 10.1136/bmj.38628.676088.55 ISSN: 0959-8138; 1468-5833 Origination: Footnote: Access State: Open Access