National Medical Journal of China, Volume 92, Issue 24,2012, Pages 1711-1714, doi:10.3760/cma.j.issn.0376-2491.2012.24.014
National Medical Journal of China, Volume 92, Issue 24,2012, Pages 1669-1672, doi:10.3760/cma.j.issn.0376-2491.2012.24.004
National Medical Journal of China, Volume 92, Issue 24,2012, Pages 1706-1710, doi:10.3760/cma.j.issn.0376-2491.2012.24.013
National Medical Journal of China, Volume 92, Issue 24,2012, Pages 1686-1689, doi:10.3760/cma.j.issn.0376-2491.2012.24.008
National Medical Journal of China, Volume 92, Issue 24,2012, Pages 1694-1697, doi:10.3760/cma.j.issn.0376-2491.2012.24.010