Fryska, Zuzanna, Jakub Kuciński, Kacper Kulik, Krystian Matusz, Rafał Burczyk, Natalie Górna, Ewelina Mazurek, and Adam Wołejko. 2023. “Co-Occurrence of Depression and Chronic Diseases”. Journal of Education, Health and Sport 13 (4):226-33. https://doi.org/10.12775/JEHS.2023.13.04.026.