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Heavy smog and hospital visits in Beijing, China.
Chen R, Zhao Z, Kan H. Chen R, et al. Among authors: zhao z. Am J Respir Crit Care Med. 2013 Nov 1;188(9):1170-1. doi: 10.1164/rccm.201304-0678LE. Am J Respir Crit Care Med. 2013. PMID: 24180450 No abstract available.
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