1. Caletti, G., Ferrari, A., 1996. Endoscopic ultrasonography. Endoscopy, 28(3):156–158.
2. Chen, T.K., Wu, C.H., Lee, C.L., Lai, Y.C., Yang, S.S., Tu, T.C., 2001. Endoscopic ultrasonography to study the causes of extragastric compression mimicking gastric submucosal tumor. J. Formos. Med. Assoc., 100(11):758–761.
3. Dou, F.T., Liu, F.Z., 1996. Falsification polyposis syndrome: characteristics in clinic and radiology. Clinical Radiology of Abroad Medicine, 19(2):96–98 (in Chinese).
4. Fusaroli, P., Caletti, G., 2005. Endoscopic ultrasonography: current clinical role. Eur. J. Gastroenterol. Hepatol., 17(3):293–301. [doi:10.1097/00042737-200503000-00006]
5. Gress, F., Schmitt, C., Savides, T., Faigel, D.O., Catalano, M., Wassef, W., Roubein, L., Nickl, N., Ciaccia, D., Bhutani, M., et al., 2001. Interobserver agreement for EUS in the evaluation and diagnosis of submucosal masses. Gastrointest. Endosc., 53(1):71–76. [doi:10.1067/mge.2001.111 384]