Randomized clinical trial of intra-anal electromyographic biofeedback physiotherapy with intra-anal electromyographic biofeedback augmented with electrical stimulation of the anal sphincter in the early treatment of postpartum fecal incontinence - Mahony, R T; Malone, P A; Nalty, J; Behan, M; O'connell, P R; O'herlihy, C (Am J Obstet Gynecol, 2004)