М.S. Burdyukov - Ph.D. (Med.) Russian Cancer Research Center of N.N. Blokhin (Mosсow). E-mail: burdyukov@rambler.ru I.N. Yurichev - An endoscopist, Russian Cancer Research Center of N.N. Blokhin (Mosсow) A.M. Nechipay - Dr. Sc. (Med.), Professor, Head of Endoscopy Chair, Medical Academy of Postgraduate Education (Moscow) D.I. Yudin - Ph.D. (Med.), Russian Cancer Research Center of N.N. Blokhin (Mosсow) O.V. Chistyakova - Ph.D. (Med.), Russian Cancer Research Center of N.N. Blokhin (Mosсow) K.K. Lactionov - Dr.Sc. (Med.), Head of Department of Clinical Biotechnology, Russian Cancer Research Center of N.N. Blokhin (Mosсow) B.I. Dolgushin - Dr.Sc. (Med.), Professor, Head of X-ray Department, Russian Cancer Research Center of N.N. Blokhin (Mosсow) D.T. Marinov - Researcher, Russian Cancer Research Center of N.N. Blokhin (Mosсow) G.V. Ungiadzhe - Dr.Sc. (Med.), Head of Endoscopy Department, Russian Cancer Research Center of N.N. Blokhin (Mosсow)