Self-perceived normality in defecation habits

Bellini, M; Alduini, P; Bassotti, G; Bove, A; Bocchini, R; Sormani, Mp; Bruzzi, P; Pucciani, F; Italian Constipation Study Group (Mammini, C; Rappelli, L; Costa, F; Stasi, C; Mumolo, Mg; Biagi, S; Ricchiuti, A; Berni, I; Giorgetti, S; Marchi, S; Mazzocchi, A; Mariano, M; Et, al. ).