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. Author manuscript; available in PMC: 2015 Nov 3.
Published in final edited form as: Environ Sci Process Impacts. 2014 Feb;16(2):239–246. doi: 10.1039/c3em00357d

Fig. 3.

Fig. 3

Meta-regression analysis of annual mean PM2.5 concentration and the non-negative excess risk (%) of mortality for all natural causes (n = 22) and for cardiovascular (n = 19) and respiratory causes (n = 13) in different studies.