CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 7,2002, Pages 440-441, doi:10.3760/j.issn:1004-4477.2002.07.018
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 7,2002, Pages 436-437, doi:10.3760/j.issn:1004-4477.2002.07.015
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CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 7,2002, Pages 406-408, doi:10.3760/j.issn:1004-4477.2002.07.006
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 7,2002, Pages 400-402, doi:10.3760/j.issn:1004-4477.2002.07.004