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)

M.S. Burdyukov - Ph.D. (Med.), Senior Research Scientist, N.N. Blokhin Russian Cancer Research Center (Moscow, Russia); Associate Professor, Department of Endoscopy, Russian Medical Academy of Postgraduate Education of Russian Ministry of Healthcare M.I. Davydov - Academician of RANS, Dr.Sc. (Med.), Professor, Director of Russian Cancer Research Center of N.N. Blokhin (Moscow, Russia) A.M. Nechipay - Dr.Sc. (Med.), Professor, Head of Science Department of Endoscopy of Russian Medical Academy of Postgraduate Education of Russian Ministry of Healthcare I.N. Yurichev - Endoscopist, N.N. Blokhin Russian Cancer Research Center (Moscow); Assistant, Department of Endoscopy, Russian Medical Academy of Postgraduate Education of Russian Ministry of Healthcare B.I. Dolgushin - Member-Correspondent of Russian Academy of Sciences, Dr.Sc. (Med.), Professor, Head Diagnostic Radiology Department, N.N. Blokhin Russian Cancer Research Center (Moscow, Russia) G.V. Ungiadze - Dr.Sc. (Med.), Professor, Head of Department of Endoscopy, N.N. Blokhin Russian Cancer Research Center (Moscow, Russia)