National Medical Journal of China, Volume 92, Issue 5,2012, Pages 359-360, doi:10.3760/cma.j.issn.0376-2491.2012.05.020
National Medical Journal of China, Volume 92, Issue 5,2012, Pages 324-326, doi:10.3760/cma.j.issn.0376-2491.2012.05.010
National Medical Journal of China, Volume 92, Issue 5,2012, Pages 289-291, doi:10.3760/cma.j.issn.0376-2491.2012.05.001
National Medical Journal of China, Volume 92, Issue 5,2012, Pages 330-335, doi:10.3760/cma.j.issn.0376-2491.2012.05.012
National Medical Journal of China, Volume 92, Issue 5,2012, Pages 327-329, doi:10.3760/cma.j.issn.0376-2491.2012.05.011