E. G. Rybakov
                        A.N. Ryzhikh State Scientific Center of Coloproctology, Ministry of Health of Russia        
Russian Federation    
2 Salyama Adilya St., 123423 Moscow
        Yu. A. Shelygin
                        A.N. Ryzhikh State Scientific Center of Coloproctology, Ministry of Health of Russia; 
Russian Medical Academy of Postgraduate Education, Ministry of Health of Russia        
Russian Federation    
2 Salyama Adilya St., 123423 Moscow
        M. A. Таraso
                        A.N. Ryzhikh State Scientific Center of Coloproctology, Ministry of Health of Russia        
Russian Federation    
2 Salyama Adilya St., 123423 Moscow
        M. V. Аlekseev
                        A.N. Ryzhikh State Scientific Center of Coloproctology, Ministry of Health of Russia; 
Russian Medical Academy of Postgraduate Education, Ministry of Health of Russia        
Russian Federation    
2 Salyama Adilya St., 123423 Moscow
        V. N. Kashnikov
                        A.N. Ryzhikh State Scientific Center of Coloproctology, Ministry of Health of Russia        
Russian Federation    
2 Salyama Adilya St., 123423 Moscow
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