Shih, M. T., Juho, Y. C., Meng, E., Sun, G. H., Cha, T. L., Wu, S. T., & Tang, S. H. (2016). Pain severity in renal colic: a retrospective evaluation of initial visits in patients at a medical center. International Surgery Journal, 3(2), 480–483. https://doi.org/10.18203/2349-2902.isj20161010