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Citation Select	Sun BC, Mangione CM, Merchant G, Weiss T, Shlamovitz GZ, Zargaraff G, Shiraga S, Hoffman JR, Mower WR, External validation of the San Francisco Syncope Rule. Ann Emerg Med. 2007 Apr;49(4):420-7, 427.e1-4
Citation Select	Sud S, Massel D, Klein GJ, Leong-Sit P, Yee R, Skanes AC, Gula LJ, Krahn AD The expectation effect and cardiac pacing for refractory vasovagal syncope. Am J Med. 2007 Jan;120(1):54-62
Citation Select	Quinn J, McDermott D, Stiell I, Kohn M, Wells G Prospective validation of the San Francisco Syncope Rule to predict patients with serious outcomes Ann Emerg Med. 2006 May;47(5):448-54