Comparative analysis of efficiency of the pipa and antevasal pyeloureteranastomosis in patients with hydronefrosis on the soil of additional lowpolar vesels - V. N. Demchenko; D. V. Shchukin; G. G. Khareba; I. M. Antonjan; A. V. Maltsev (Actual problems of transport medicine: environment, occupational health, pathology, 2020)