Jarzebicka, D., Sieczkowska, J., Dadalski, M., Kierkus, J., Ryzko, J., & Oracz, G. (2016). Evaluation of the effectiveness of biofeedback therapy for functional constipation in children. Turkish Journal of Gastroenterology, 27(5), 433–438. https://doi.org/10.5152/tjg.2016.16140