7.Isagulyan, E., Tkachenko, V., Semenov, D., Asriyants, S., Dorokhov, E., Makashova, E., Aslakhanova, K., Tomskiy, A. The Effectiveness of Various Types of Electrical Stimulation of the Spinal Cord for Chronic Pain in Postherpetic Neuralgia: A Literature Review, 2023