1. V.A. Almazov National Medical Research Centre, Ministry of Health of Russia; 2 Akkuratova St., Saint-Petersburg 197341; Saint-Petersburg State Pediatric Medical University, Ministry of Health of Russia; 2 Litovskaya St., Saint-Petersburg 194100
2. I.I. Mechnikov North-Western State Medical University, Ministry of Health of Russia; 1/28 Sant’yago-de-Kuba St., Saint-Petersburg 194291
3. Municipal Children Hospital № 1; 14 Avangardnaya St., Saint-Petersburg 198205
4. N.N. Petrov National Medical Research Center of Oncology, Ministry of Health of Russia; 40 Vyborgskoe Shosse, Saint-Petersburg 194356