CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 10, Issue 8,2007, Pages 948-949, doi:10.3969/j.issn.1007-9564.2007.08.076
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CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 10, Issue 8,2007, Pages 924-925, doi:10.3969/j.issn.1007-9564.2007.08.052
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