Department of Ultrasonography The First Affiliated Hospital Dalian Medical University Dalian 116011 China;
Department of Ultrasonography The First Affiliated Hospital Dalian Medical University Dalian 116011 China;
Department of Ultrasonography The First Affiliated Hospital Dalian Medical University Dalian 116011 China;
Department of Ultrasonography The First Affiliated Hospital Dalian Medical University Dalian 116011 China;
The Central Lab The Second Affiliated Hospital Dalian Medical University Dalian 116027 China;