title: Letter to the editor.
authors: University of Miami, Depratment of Urology, Miami, United States.
authors: Mohamed
authors: M
authors: Etafy
authors: Alazhar University, Cairo, Egypt.
authors: Mohamed
authors: M
authors: Abd Aal
authors: Universidad Central de Venezuela, Escuela de Medicina Luis Carreño, Caracas, Venezuela.
authors: Cervando
authors: C
authors: Ortiz-Vanderdys