CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 7,2011, Pages 1015-1016,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 7,2011, Pages 969-971,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 7,2011, Pages 1006-1007,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 7,2011, Pages 1064-1066,