STAGING OF KLATSKIN TUMOR BY US, DOPPLER-US AND CT: COMPARISON WITH OPERATIVE FINDINGS. - Loria, F.; Cantoni, S.; Centorrino, T.; De Renzis, C.; Loria, G.; Ascenti, G.; Blandino, A.; Frosina, P.; Scribano, E.; Frola, C. (HPB Surgery, 1996)