1. Russian Medical Academy of Continuous Professional Education
2/1 Barricadnaya str., Moscow, 125993, Russia
2. Saratov State Medical University n. a. V.I. Razumovsky
112 Bolshaya Kazachya str., Saratov, 410012, Russia
3. City Clinical Hospital n.a. S.P. Botkin
5 2nd Botkinsky passage, Moscow, 125284, Russia