Body Mass Index and Mortality in Chronic Obstructive Pulmonary Disease: A Meta-Analysis Cao, Chao ; Wang, Ran ; Wang, Jianmiao ; Bunjhoo, Hansvin ; Xu, Yongjian ; Xiong, Weining Abstract Publication: PLoS ONE Pub Date: August 2012 DOI: 10.1371/journal.pone.0043892 Bibcode: 2012PLoSO...743892C