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The presence of B12 deficiency itself may indicate an underlying digestive disorder that requires specific investigation and management
Preliminary report Dose-responses for the slowing of gastric emptying in a rodent model by glucagon-like peptide (736)NH2, amylin, cholecystokinin, and other possible regulators of nutrient uptake
H57.9 is a separate code for disorders that are genuinely unspecified, where the documentation does not name the condition
Vitamin C reduces the severity of common colds: a meta-analysis
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