1. City Clinical Hospital n.a. S.P. Botkin
2. City Clinical Hospital n.a. S.P. Botkin; Department of Anesthesiology and Emergency Medicineof the Russian Medical Academy of Continuing Professional Education
3. City Clinical Hospital n.a. S.P. Botkin; Department of Endoscopy of the Russian Medical Academy of Continuing Professional Education
4. Department of Anesthesiology and Emergency Medicineof the Russian Medical Academy of Continuing Professional Education