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ORIGINAL RESEARCH
Changes in gut microbiota composition and their associations with cortisol, melatonin and interleukin 6 in patients with chronic insomnia
V.I. Vernadsky Crimean Federal University, Simferopol, Russia
Correspondence should be addressed: Lesya N. Gumenyuk
Lenin boulevard, 5/7, Simferopol, Republic of Crimea, 295006; ur.liam@kuynemyg_aysel
Author contribution: Masyutina AA, Fatovenko YuV collected, analyzed and interpreted the obtained data; Gumenyuk LN proposed the concept and design for the study; Sorokina LE, Bayramova SS, Alekseenko AA performed statistical analysis; Shavrov YuV, Romanova AA, Seydametova DI wrote the manuscript.
Compliance with ethical standards: the study was approved by the Ethics Committee of Georgievsky Medical Academy (Protocol № 10 dated November 16, 2020) and complied with the Declaration of Helsinki. Voluntary informed consent was obtained from all study participants.

