title: Intragastric levarterenol prior to laser phototherapy.
mesh_terms: D000293:Adolescent; D000368:Aged; D006471:Gastrointestinal Hemorrhage / Q000188:drug therapy / Q000601:surgery*; D006801:Humans; D053685:Laser Therapy; D008875:Middle Aged; D009638:Norepinephrine / Q000627:therapeutic use*; D007507:Therapeutic Irrigation
chemical_list: D009638:Norepinephrine