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#ExistCollect>Collect: Biopsies of small bowel by endoscopy.
#ExistSPECIMENPREPARATION>Specimen Preparation: Place two 5 mg biopsies of tissue on the wall of a small, tightly-capped plastic tube without any supporting media. A 1 mL flat-bottom microtube is recommended. Freeze within 2 hours of collection.
#ExistSPECTRANSPORT>Storage/Transport Temperature: Frozen. Ship on dry ice.
#ExistConditions>Unacceptable Conditions: Room temperature or refrigerated specimens. Specimens placed on gauze, filter paper, or any other type of support media. Tissue preserved in formalin.
#ExistStability>Stability (collection to initiation of testing): Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 6 months