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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 27 July 2024]. DOI 10.12775/JEHS.2022.12.12.046.