National Medical Journal of China, Volume 93, Issue 10,2013, Pages 760-763, doi:10.3760/cma.j.issn.0376-2491.2013.10.012
National Medical Journal of China, Volume 93, Issue 10,2013, Pages 797-798, doi:10.3760/cma.j.issn.0376-2491.2013.10.021
National Medical Journal of China, Volume 93, Issue 10,2013, Pages 756-759, doi:10.3760/cma.j.issn.0376-2491.2013.10.011
National Medical Journal of China, Volume 93, Issue 10,2013, Pages 780-784, doi:10.3760/cma.j.issn.0376-2491.2013.10.