Adamczyk-Gruszka, O., Gruszka, J., Świercz, G., & Zwierzyńska, A. (2022). Carcinoid syndrome: clinical case report of carcinoid tumor: duodenal bulb, lung, renal clear cell carcinoma. Journal of Education, Health and Sport, 12(3), 42–52. https://doi.org/10.12775/JEHS.2022.12.03.004