National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1731-1733, doi:10.3760/cma.j.issn.0376-2491.2012.25.002
National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1767-1769, doi:10.3760/cma.j.issn.0376-2491.2012.25.011
National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1759-1762, doi:10.3760/cma.j.issn.0376-2491.2012.25.009
National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1784-1786, doi:10.3760/cma.j.issn.0376-2491.2012.25.016
National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1729-1730, doi:10.3760/cma.j.issn.0376-2491.2012.25.001