National Medical Journal of China, Volume 92, Issue 23,2012, Pages 1612-1614, doi:10.3760/cma.j.issn.0376-2491.2012.23.008
National Medical Journal of China, Volume 92, Issue 23,2012, Pages 1640, doi:10.3760/cma.j.issn.0376-2491.2012.23.015
National Medical Journal of China, Volume 92, Issue 23,2012, Pages 1618-1620, doi:10.3760/cma.j.issn.0376-2491.2012.23.010
National Medical Journal of China, Volume 92, Issue 23,2012, Pages 1591-1595, doi:10.3760/cma.j.issn.0376-2491.2012.23.003
National Medical Journal of China, Volume 92, Issue 23,2012, Pages 1599-1602, doi:10.3760/cma.j.issn.0376-2491.2012.23.005