A New Classification for Hemorrhoidal Disease: the Creation of the ""BPRST"" Staging and Its Application in Clinical Practice - Sobrado Junior, Carlos Walter; Obregon, Carlos de Almeida; Sousa Junior, Afonso Henrique da Silva e; Sobrado, Lucas Faraco; Nahas, Sergio Carlos; Cecconello, Ivan (Annals of coloproctology, 2020)