No differences were found in thermal sensitivity ( esophagus ( p = 0.67 ) and duodenum ( p = 0.17 ) ) , sensory response to electrical stimulation ( esophagus ( p = 0.57 ) and duodenum ( p = 0.52 ) ) or induced somatic referred pain areas ( esophagus ( p = 0.75 ) and duodenum ( p = 0.51 ) ) .
