Perveen, S., Rahman, S. M., Hossain, M. S. M., Chowdhury, N. G., & Ahmed, M. A. (2018). Difficult ERCP with Aberrant Papilla A Report of Three Cases. Journal of Bangladesh College of Physicians and Surgeons, 36(1), 37–40. https://doi.org/10.3329/jbcps.v36i1.35510