NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 12,2011, Pages 815-818, doi:10.3760/cma.j.issn.0376-2491.2011.12.011
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 12,2011, Pages 850-851, doi:10.3760/cma.j.issn.0376-2491.2011.12.020
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 12,2011, Pages 852-854, doi:10.3760/cma.j.issn.0376-2491.2011.12.021
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 91, Issue 12,2011, Pages 858-860, doi:10.3760/cma.j.issn.0376-2491.2011.12.023