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Macedo W Jr, Sturmann K, Kim JM, Kang J.Macedo W Jr, et al.J Emerg Med. 1999 May-Jun;17(3):491-6. doi: 10.1016/s0736-4679(99)00041-4.J Emerg Med. 1999.PMID: 10338244
Sturmann K.Sturmann K.Emerg Med Clin North Am. 1997 Aug;15(3):491-506. doi: 10.1016/s0733-8627(05)70314-x.Emerg Med Clin North Am. 1997.PMID: 9255129Review.