Figure 1.

An example for the scheme of an expert physician to approach abdominal pain^!. ^! This is an example for the experts' scheme of abdominal pain and not derived from a qualitative relevant study. * Onset of symptom. ** male gender, age > 60 years, history of blood in stool, pain affecting sleep, no pain relief after defecation, no specific character of pain, weight loss > 1 kg in 4 weeks. *** White blood cell count > 10,000 mm^-3, erythrocyte sedimentation rate > 20 mm per hour, low hemoglobin level.