CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 5,2004, Pages 341-344, doi:10.3760/j.issn:1004-4477.2004.05.005
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 5,2004, Pages 395-396, doi:10.3760/j.issn:1004-4477.2004.05.024
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 5,2004, Pages 379-381, doi:10.3760/j.issn:1004-4477.2004.05.016
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CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 13, Issue 5,2004, Pages 348-351, doi:10.3760/j.issn:1004-4477.2004.05.007