Demilow, T. L.; Ngowi, B. N.; Mbwambo, J. S.; Bright, F.; Kiwango, F.; Mteta, A. K.; Mbwambo, O. J. Pen Cap in the Urinary Bladder: A Rare Type Foreign Body in the Urinary Bladder in a 16 Years Old Female. GSC Adv. Res. Rev. 2021, 6, 175-180.