S. S. Nikitin
Petrozavodsk State University; Children’s Republican Hospital named after I.N. Grigovich
Russian Federation

Sergey S. Nikitin - Dr. Sci. (Med.), Professor of the Department of Pediatrics and Pediatric Surgery of the Medical Institute, Petrozavodsk State University; Head of the Center for Pediatric Urology, Andrology and Nephrology, Children’s Republican Hospital named after I.N. Grigovich.

33, Lenin Ave., Petrozavodsk, 185002; 58, Parkovaya St., Petrozavodsk, 185002

N. B. Guseva
Children’s City Clinical Hospital No. 9 named after G.N. Speransky; Research Clinical Institute of Pediatrics and Pediatric Surgery named after Academician Yu.E. Veltishchev, Pirogov Russian National Research Medical University; Russian Medical Academy of Continuous Professional Education
Russian Federation

Natalia В. Guseva - Dr. Sci. (Med.), Head of the Center of Urology-Andrology and Pathology of Рelvic Organs, Children’s City Clinical Hospital No. 9 named after G.N. Speransky; Chief Researcher, Research Clinical Institute of Pediatrics named after Academician Yu.E. Veltishchev; Professor of the Department of Pediatrics named after G.N. Speransky, Russian Medical Academy of Continuous Professional Education.

29, Shmitovsky Proezd, Moscow, 123317; 2, Taldomskaya St., Moscow, 125412; 28, Geroev Panfilovtsev St., Moscow, 125373

V. S. Nikitin
Petrozavodsk State University
Russian Federation

Vadim S. Nikitin - Student, Petrozavodsk State University.

33, Lenin Ave., Petrozavodsk, 185002