217 IMPAIRED VAGAL EFFICIENCY PREDICTS PAIN REDUCTION WITH PERCUTANEOUS ELECTRICAL NERVE FIELD STIMULATION (PENFS)
THERAPY FOR FUNCTIONAL ABDOMINAL PAIN DISORDERS. Katja Kovacic1, Jacek Kolacz2, Stephen Porges2. 1Department of Pediatrics, Medical
College of Wisconsin, Milwaukee, WI, USA; 2Kinsey Institute, Indiana University, Bloomington, IN, USA.