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Colonoscopy: While melena often originates in the upper GI tract, a colonoscope is used to rule out large-intestinal or rectal sources of bleeding, ensuring no lower source of bleeding is overlooked
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Lancet 402(10401):529544 Papageorgiou M, Biver E (2023) Bone consequences of intentional weight loss in overweight or obese patients
doi: 10.1007/s00705-006-0880-2 85 ZhangK.ShenY.WangT.WangY.XueS.LuanH.et al
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