NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 15,2009, Pages 1024-1027, doi:10.3760/cma.j.issn.0376-2491.2009.15.005
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 15,2009, Pages 1067-1070, doi:10.3760/cma.j.issn.0376-2491.2009.15.015
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 15,2009, Pages 1075-1077, doi:10.3760/cma.j.issn.0376-2491.2009.15.017
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 15,2009, Pages 1041-1046, doi:10.3760/cma.j.issn.0376-2491.2009.15.009