1. From the Departments of Urology, Sint Radboud University Hospital, Nijmegen and St. Annadal University Hospital, Maastricht, The Netherlands
2. A. Ö. Hospital, Mistelbach, Austria
3. Princess Royal Hospital, Hull
4. York District Hospital, York
5. Pontefract General Infirmary, Pontefract and St. James’ University Hospital, Leeds, United Kingdom