Abdullah, M., Maulahela, H., Utari, A. P., Kusumo, P. D., Soebandrio, A., Achmad, I., William, A., & Makmun, D. (2019). Patient assessment of constipation quality of life questionnaire: validity and reliability for Indonesian population. Medical Journal of Indonesia, 28(4), 345-50. https://doi.org/10.13181/mji.v28i4.3353