National Medical Journal of China, Volume 92, Issue 22,2012, Pages 1550-1552, doi:10.3760/cma.j.issn.0376-2491.2012.22.012
National Medical Journal of China, Volume 92, Issue 22,2012, Pages 1558-1559, doi:10.3760/cma.j.issn.0376-2491.2012.22.015
National Medical Journal of China, Volume 92, Issue 22,2012, Pages 1569-1572, doi:10.3760/cma.j.issn.0376-2491.2012.22.018
National Medical Journal of China, Volume 92, Issue 22,2012, Pages 1527-1531, doi:10.3760/cma.j.issn.0376-2491.2012.22.006
National Medical Journal of China, Volume 92, Issue 22,2012, Pages 1540-1543, doi:10.3760/cma.j.issn.0376-2491.2012.22.009