3. Gastrointestinal abnormalities causing impaired absorption requiring intravenous alimentation, prior surgical procedures affecting absorption including gastric resection, treatment for active peptic ulcer disease in the past 6 months, active gastrointestinal bleeding, unrelated to cancer, as evidenced by hematemesis, hematochezia or melena in the past 3 months without evidence of resolution documented by endoscopy or colonoscopy, malabsorption syndromes.