M. Mokhtare, S.-M.-S. Ghafoori, M. Soltani-Kermanshahi, A.-H. Boghratian, S. Agah, and M. Sheikhvatan, “Reliability and Validity of the Persian Version of Patient Assessment of Constipation: Quality of Life (PAC-QOL) Questionnaire”, Gastroenterol Hepatol Bed Bench, vol. 10, no. 4, pp. 289–294, Oct. 2017.