Chinese Journal of Coal Industry Medicine, Volume 14, Issue 11,2011, Pages 1644,
Chinese Journal of Coal Industry Medicine, Volume 14, Issue 11,2011, Pages 1696,
Chinese Journal of Coal Industry Medicine, Volume 14, Issue 11,2011, Pages 1599-1600,
Chinese Journal of Coal Industry Medicine, Volume 14, Issue 11,2011, Pages 1715-1716,