30.Gallagher, EJ,
Esses, D,
Lee, C,
et al.
Randomized clinical trial of morphine in acute abdominal pain.
Ann Emerg Med.
2006;
48:160e1-160e4. Available:
http://download.journals.else vierhealth.com/pdfs/journals/01960644/PIIS0196064405019608.pdf (accessed 2006 Sept. 26).
CrossRefGoogle ScholarPubMed