CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 11,2002, Pages 683-686, doi:10.3760/j.issn:1004-4477.2002.11.012
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 11,2002, Pages 694-695, doi:10.3760/j.issn:1004-4477.2002.11.017
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 11,2002, Pages 693-694, doi:10.3760/j.issn:1004-4477.2002.11.016
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 11,2002, Pages 676-678, doi:10.3760/j.issn:1004-4477.2002.11.010
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 11, Issue 11,2002, Pages 648-650, doi:10.3760/j.issn:1004-4477.2002.11.002