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NATIONAL MEDICAL JOURNAL OF CHINA, Volume 90, Issue 14,2010, Pages 967-971, doi:10.3760/cma.j.issn.0376-2491.2010.14.009
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 90, Issue 14,2010, Pages 942-946, doi:10.3760/cma.j.issn.0376-2491.2010.14.003
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 90, Issue 14,2010, Pages 985-987, doi:10.3760/cma.j.issn.0376-2491.2010.14.013