Chinese Journal of Coal Industry Medicine, Volume 15, Issue 6,2012, Pages 827-828,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 6,2012, Pages 860-861,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 6,2012, Pages 854-855,
Chinese Journal of Coal Industry Medicine, Volume 15, Issue 6,2012, Pages 794-796,