Bristol scale stool form. A still valid help in medical practice and clinical research[J] . G. Riegler,I. Esposito.Techniques in Coloproctology . 2001 (3)
Bristol scale stool form. A still valid help in medical practice and clinical research[J] . G. Riegler,I. Esposito.Techniques in Coloproctology . 2001 (3)