- Laboratory analysis
- Conventional X-ray
- Electrocardiogram
- Ergometry
- Spirometry
- 24 hours blood pressure registration
- Abdominal Ultrasound
- Doppler- Ultrasound
- Esophago-gastro-duodenoscopy
- Colonoscopy
- Double-balloon- enteroscopy
- Anoscopy
- Endoscopic Ultrasound
- 24 hours pH-Metry
