1. Volkov AG, Stagnieva IV. Forehead headache from a perspective of an otorhinolaryngologist. Rossijskaja rinologija. 2007;(4):29-34. (In Russ.)
2. Fokine NM, Dudnik EN. Interdisciplinary aspects of facial pain. Ural’skij medicinskij zhurnal. 2015;(2):24-28. (In Russ.)
3. Orlova OR. Face pain: at the junction of disciplines. Consilium medicum. 2014;16(2):103-105. (In Russ)
4. The prevalence of facial pain and purulent sinusitis
5. Crosstalk between the nociceptive and immune systems in host defence and disease