Importance of urodynamic evaluation of bladder function after secondary untethering in spina bifida patients: single center experience of 30 years.

"Declarations Conflict of interestThe authors have no conflicts of interests to declare. Ethical approvalThe study was approved by the ethics committee Charité Berlin (no. EA2/093/17) and data security commission (AZ455/17). The data was collected and approved according to the guidelines of the institutional review board which is based on the ICH Guideline for Good Clinical Practice and the declaration of the World Medical Association from 1964 (Helsinki) in their current version. Patient consent for review of medical record was not required. This was approved according to the guidelines of the institutional review board by the ethics committee Charité (Berlin, Germany). All data were de-identified and the patient data was treated anonymously. Conflict of interest The authors have no conflicts of interests to declare."

"Funding Open Access funding enabled and organized by Projekt DEAL."