CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 3,2011, Pages 354-355,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 3,2011, Pages 411-412,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 3,2011, Pages 419-421,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 14, Issue 3,2011, Pages 457-459,