参考
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Manterola, Carlos; Vial, Manuel; Moraga, Javier; Astudillo, Paula (2011-01-19). "Analgesia in patients with acute abdominal pain". Cochrane Database of Systematic Reviews (1): CD005660. doi:10.1002/14651858.cd005660.pub3. ISSN 1465-1858. PMID 21249672.
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