TY - JOUR AU - Chiarioni, G; Salandini, L; Whitehead, W E TI - Biofeedback benefits only patients with outlet dysfunction, not with patients with isolated slow transit constipation JO - Gastroenterology VL - 129 PY - 2005 DO - 10.1053/j.gastro.2005.05.015 SP - 86 EP - 97 ER -