CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 8, Issue 3,2005, Pages 313-314, doi:10.3969/j.issn.1007-9564.2005.03.079
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CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 8, Issue 3,2005, Pages 220-222, doi:10.3969/j.issn.1007-9564.2005.03.010