1. Department of UrologyUniversity of Pittsburgh School of MedicinePittsburgh Pennsylvania
2. 2nd Department of UrologySismanogleio General HospitalNational and Kapodistrian University of AthensAthens Greece
3. Bristol Urological InstituteUniversity of BristolBristol UK
4. 2nd Department of Urology, Papageorgiou General HospitalAristotle University of ThessalonikiThessaloniki Greece