1. Medvedeva LA, Zagorulko OI, Gnezdilov AV. Chronic pain: epidemiology and social demographic characteristics of patients of Pain Clinic in the Surgery Center. Klinicheskaya i eksperimental’naya khirurgiya. Zhurnal im. akad. B.V. Petrovskogo. 2016;4(3):36-43. (In Russ.)
2. Yakhno NN, Kukushkin ML, Churyukanov MV, Syrovegin AV. The results of open multicentral study «MERIDIAN» for assessment of pain syndromes prevalence in ambulatory and therapeutic preferences of physicians. Russian Journal of Pain. 2012;3:10-14. (In Russ.)
3. Misuse of Medicines in the European Union: A Systematic Review of the Literature
4. Pharmacokinetic–pharmacodynamic modeling in acute and chronic pain: an overview of the recent literature
5. Epidemiology of chronic non-malignant pain in Denmark