CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 8,2004, Pages 640, doi:10.3760/j.issn:1004-4477.2004.08.039
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CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 8,2004, Pages 577-580, doi:10.3760/j.issn:1004-4477.2004.08.004
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 8,2004, Pages 630-631, doi:10.3760/j.issn:1004-4477.2004.08.021
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 8,2004, Pages 585-587, doi:10.3760/j.issn:1004-4477.2004.08.006