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POHRYBIENIUK, Janina, KROTLIŃSKI, Antoni, DUSIŃSKA, Aleksandra, SOKOŁOWSKA, Julia and CHABOWSKI, Mariusz. Loneliness among surgical patients - measuring levels of loneliness using De Jong Gierveld Loneliness Scale and Revised UCLA Loneliness Scale. Journal of Education, Health and Sport. Online. 23 December 2022. Vol. 12, no. 12, pp. 303-310. [Accessed 24 February 2026]. DOI 10.12775/JEHS.2022.12.12.046.