Section to complete the data related to the clinical sites involved in the trial: site and responsible investigator for every site.
      Countries of recruitment: 
    
 
      Clinical sites: 
    
            
                    Cienfuegos, “Gustavo Aldereguia Lima” University Hospital, Dra. Martha Casanova Gonzalez; Specialist 2nd. Nephrology Degree        
              
                    Pinar del Rio, San Cristobal, ''Comandante Pinares'' Hospital, Dr. Orosman Cuesta Panaco; First Degree Specialist in Nephrology        
         
 
      Research ethics committees: 
    
            
                    National Institute of Nephrology (INEF), november 4, 2005.         
              
                    “Gustavo Aldereguia Lima” University Hospital, november 15, 2005.         
              
                    Comandante Pinares Hospital, september 4, 2006.