NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 25,2009, Pages 1766-1769, doi:10.3760/cma.j.issn.0376-2491.2009.25.012
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 25,2009, Pages 1729-1731, doi:10.3760/cma.j.issn.0376-2491.2009.25.001
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 25,2009, Pages 1791-1793, doi:10.3760/cma.j.issn.0376-2491.2009.25.018
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 25,2009, Pages 1770-1773, doi:10.3760/cma.j.issn.0376-2491.2009.25.013
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 25,2009, Pages 1745-1748, doi:10.3760/cma.j.issn.0376-2491.2009.25.007