1. Endoscopy-Endourology Department, Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain.
2. Urology Department, University Hospital La Fe, Valencia, Spain.
3. Urology Department, University Hospital Río Hortega, Valladolid, Spain.
4. Urology Department, University Hospital Santiago Ramón y Cajal, Madrid, Spain.
5. Urology Department, University Hospital Clínico San Carlos, Madrid, Spain.
6. Scientific Direction, Jesús Usón Minimally Invasive Surgery Centre, Cáceres, Spain.