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 1751-1755, doi:10.3760/cma.j.issn.0376-2491.2012.25.007
National Medical Journal of China, Volume 92, Issue 25,2012, Pages 1789-1792, doi:10.3760/cma.j.issn.0376-2491.2012.25.018