Chinese Journal of Ultrasonography, , Issue 11,2014, Pages 987-989, doi:10.3760/cma.j.issn.1004-4477.2014.11.022
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Chinese Journal of Ultrasonography, , Issue 11,2014, Pages 979-982, doi:10.3760/cma.j.issn.1004-4477.2014.11.019