National Medical Journal of China, Volume 93, Issue 25,2013, Pages 1958-1961, doi:10.3760/cma.j.issn.0376-2491.2013.25.006
National Medical Journal of China, Volume 93, Issue 25,2013, Pages 1989-1992, doi:10.3760/cma.j.issn.0376-2491.2013.25.014
National Medical Journal of China, Volume 93, Issue 25,2013, Pages 1948-1951, doi:10.3760/cma.j.issn.0376-2491.2013.25.004
National Medical Journal of China, Volume 93, Issue 25,2013, Pages 1962-1964, doi:10.3760/cma.j.issn.0376-2491.2013.25.007
National Medical Journal of China, Volume 93, Issue 25,2013, Pages 1940-1943, doi:10.3760/cma.j.issn.0376-2491.2013.25.002