1 Vreden Russian Research Institute of Traumatology and Orthopedics, 8, ul. Akad. Baykova, St. Petersburg, Russian Federation, 195427.
2 Hip Pathology Department, Vreden Russian Research Institute of Traumatology and Orthopedics, 8, ul. Akad. Baykova, St. Petersburg, Russian Federation, 195427. [email protected].