https://www.cochrane.org/fr/CD014999/CENTRALED_l-embolisation-transarterielle-prophylactique-obstruction-des-vaisseaux-sanguins-par-precaution-est 2025 United Kingdom review of literature french abstract endoscopes hemorrhage, nos peptic ulcer obstruction, nos endoscopy, nos gastric ulcer, nos stomach ulcer blood vessels stomach hemorrhage peptic ulcer, nos attentiveness tube, nos bloodletting endoscope, nos endoscopy