CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 3,2004, Pages 237-238, doi:10.3760/j.issn:1004-4477.2004.03.027
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 3,2004, Pages 236-237, doi:10.3760/j.issn:1004-4477.2004.03.026
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CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 3,2004, Pages 234-235, doi:10.3760/j.issn:1004-4477.2004.03.024