CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 18, Issue 7,2009, Pages 605-607, doi:10.3760/cma.j.issn.1004-4477.2009.07.020
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 18, Issue 7,2009, Pages 575-577, doi:10.3760/cma.j.issn.1004-4477.2009.07.009
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 18, Issue 7,2009, Pages 554-557, doi:10.3760/cma.j.issn.1004-4477.2009.07.002
CHINESE JOURNAL OF ULTRASONOGRAPHY, Volume 18, Issue 7,2009, Pages 625-627, doi:10.3760/cma.j.issn.1004-4477.2009.07.026