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

Sergei S. Nikitin - Dr. Sci. (Med.), Professor of the Department of Pediatrics and Pediatric Surgery of the Medical Institute, Petrozavodsk SU; Head of the Surgical Department and of the Center for Pediatric Urology, Andrology and Nephrology, CRH named after I.N. Grigovich.

33, Lenin Ave., Petrozavodsk, Republic of Karelia, 185910; 58, Parkovaya St., Petrozavodsk, Republic of Karelia, 185002

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

Natalia B. Guseva - Dr. Sci. (Med.), Professor of the Department of Pediatrics, RMA CPE; Head of the Moscow City Center of Pediatric Urology, Andrology and Pathology of Pelvic Organs, Children’s City Clinical Hospital No. 9 named after G.N. Speransky; Chief Researcher of the Department of Pediatric Surgery, Veltischev Research and Clinical Institute for Pediatrics and Pediatric Surgery of the Pirogov RNRMU.

2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993; 29, Shmitovsky Proezd, Moscow, 123317; 2, Taldomskaya St., Moscow, 125412

S. A. Kononova
Petrozavodsk State University
Russian Federation

Svetlana A. Kononova - Senior Lecturer of the Department of Pediatrics and Pediatric Surgery of the Medical Institute.

33, Lenin Ave., Petrozavodsk, Republic of Karelia, 185910