TY - JOUR AN - 19 AU - Xu,H.X. AU - Liu,G.J. AU - Lu,M.D. TI - Characterization of small focal liver lesions using real-time contrast-enhanced. Diagnostic performance analysis in 200 patients. JO - JĀ Ultrasound Med PY - 2006 VL - 25 SP - 349-361 M2 - 349 ER -