Semen, M.O., Lychkovska, O.L., Semen, V.D. and Yelisieieva, O.P. 2022. Heart rate variability and trait anxiety in children with irritable bowel syndrome: is there a link?. Zaporozhye Medical Journal. 24, 5 (Oct. 2022), 547–555. DOI:https://doi.org/10.14739/2310-1210.2022.5.256942.