O.I. Kostyleva - Ph.D. (Med.), Senior Research Scientist, Clinical Biochemistry Laboratory, N.N. Blokhin Russian Cancer Research Center, Moscow E-mail: ok_olga68@mail.ru V.V. Mushtenko - Post-graduate Student, Clinical Biochemistry Laboratory, N.N. Blokhin Russian Cancer Research Center, Moscow S.D. Bezanova - Post-graduate Student, Pathology Department, N.N. Blokhin Russian Cancer Research Center, Moscow D.S. Mikhaylenko -Ph.D. (Med.), Senior Research Scientist, Institute of Molecular Medicine, Sechenov First Mos-cow State Medical University Senior Researcher Russia, Moscow N.E. Kushlinskii - Dr.Sc. (Med.), Professor, Member-Correspondent of Russian Academy of Sciences, Head of the Clinical Biochemistry Laboratory, N.N. Blokhin Russian Cancer Research Center, Moscow