Pupillary reactivity in children with recurrent abdominal pain.
D000005:Abdomen; D001341:Autonomic Nervous System / Q000503:physiopathology*; D002648:Child; D005260:Female; D006706:Homeostasis; D006801:Humans; D008297:Male; D010146:Pain; D011680:Pupil; D013312:Stress, Physiological