[1] SHANDONG PROV HOSP,SHANDONG PROV MED IMAGING RES INST,JINAN,PEOPLES R CHINA
[2] KLINIKUM MANNHEIM,DEPT RADIOL,D-6800 MANNHEIM 1,FED REP GER
[3] SHANDONG PROV HOSP,DEPT RADIOL,JINAN,PEOPLES R CHINA
[4] NEW ENGLAND DEACONESS HOSP,DEPT RADIOL,BOSTON,MA 02215