Nasiri, J., F. Jahangiri, and S. M. Moussavi-khoshdel. “Mild Anterior Displacement of the Anus As a Cause of Constipation: Introducing a New Modality for Diagnosis”. Iranian Journal of Pediatric Surgery, vol. 4, no. 1, June 2018, pp. 21-24, doi:10.22037/irjps.v4i1.19392.