Fig. 1
Flowchart of the study population. Abbreviations: ICD-9 CM: International Classification of Diseases, Ninth Revision, Clinical Modification; POUR: postoperative urinary retention
Fig. 1 | BMC Surgery
Flowchart of the study population. Abbreviations: ICD-9 CM: International Classification of Diseases, Ninth Revision, Clinical Modification; POUR: postoperative urinary retention