Chinese Journal of Coal Industry Medicine, Volume 15, Issue 8,2012, Pages 1218,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 8,2012, Pages 1237-1238,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 8,2012, Pages 1226-1227,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 8,2012, Pages 1189-1190,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 8,2012, Pages 1203-1205,