1. Department of Urology; Isala klinieken; Zwolle Netherlands
2. Dry Bed Center; Noorderboog hospital; Meppel Netherlands
3. Pediatric Urology Centre, Department of Urology, Radboudumc, Amalia Children's Hospital; Radboud University Medical Centre; Nijmegen Netherlands
4. Netherlands Institute of Health Sciences (NIHES); Erasmus Medical Centre; Rotterdam Netherlands
5. Department of General Practice; University of Groningen; University Medical Centre Groningen; Groningen Netherlands