CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 12,2004, Pages 901, doi:10.3760/j.issn:1004-4477.2004.12.026
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CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 12,2004, Pages 918, doi:10.3760/j.issn:1004-4477.2004.12.027
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 12,2004, Pages 953-954, doi:10.3760/j.issn:1004-4477.2004.12.022