NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 40,2009, Pages 2822-2826, doi:10.3760/cma.j.issn.0376-2491.2009.40.004
SHANDONG MEDICAL JOURNAL, Volume 49, Issue 40,2009, Pages 48-49, doi:10.3969/j.issn.1002-266X.2009.40.022
NATIONAL MEDICAL JOURNAL OF CHINA, Volume 89, Issue 40,2009, Pages 2867-2870, doi:10.3760/cma.j.issn.0376-2491.2009.40.016
JOURNAL OF CLINICAL REHABILITATIVE TISSUE ENGINEERING RESEARCH, Volume 13, Issue 40,2009, Pages 7843-7846, doi:10.3969/j.issn.1673-8225.2009.40.007