TY - JOUR AU - Ren, X L; Yan, R L; Yu, X H TI - Biliary cystadenocarcinoma diagnosed with real-time contrast-enhanced ultrasonography: Report of a case with diagnostic features JO - World J Gastroenterol VL - 16 PY - 2010 SP - 131 EP - 135 N1 - et al. ER -