8[1]Levy MJ,Wiersema MJ.Endoscopic ultrasound in the diagnosis and staging of pancreatic cancer.Oncology (Williston Park) 2002; 16:29-38,43; discussion 44,47-49,53-56
9[2]Fujita N,Noda Y,Kobayashi G,Kimura K,Ito K.Endoscopic approach to early diagnosis of pancreatic cancer.Pancreas 2004; 28:279-281.
10[3]Dietrich CF,Ignee A,Trojan J,Fellbaum C,Schuessler G.Improved characterisation of histologically proven liver tumours by contrast enhanced ultrasonography during the portal venous and specific late phase of SHU 508A.Gut 2004; 53:401-405.
