Nikolay Petrovich Omeliyanenko, Doctor of Medicine, Professor, Member of the New York Academy of Sciences, Winner of the Prize of the Russian Federation Government, the Chief of the Laboratory of Connective Tissue of the Central Research Institute of Traumatology and Orthopedics of N.N. Priorov, the Department of Public Health of the Russian Federation. The scientific interests: structural and functional organization of bone, cartilaginous tissue and other connective tissue types in health, regeneration and pathology. Leonid Ilyich Slutsky, Professor Emeritus, Doctor Habilitatus of Medicine. In 1960–1996 – the Chief of the Laboratory of Biochemistry of the Riga Research Institute of Traumatology and Orthopedics (Latvia). The main scientific interests: biochemistry of the connective tissue and skeleton. Sergey Pavlovich Mironov, Doctor of Medicine, Professor, Academician of the Russian Academy of Sciences and Russian Academy of Medical Sciences, Honoured Worker of Science of the Russian Federation, Winner of the State Prize and the Prize of the Russian Federation Government, the Head of the Central Research Institute of Traumatology and Orthopaedics of N.N. Priorov, the Department of Public Health of the Russian Federation. Field of research: clinical and fundamental orthopedics and traumatology.