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McCollister HM, Severson PA, LeMieur TP, Roberts SA, Gujer MW.McCollister HM, et al. Among authors: severson pa.Surg Clin North Am. 2009 Dec;89(6):1349-57, ix. doi: 10.1016/j.suc.2009.09.011.Surg Clin North Am. 2009.PMID: 19944817
Snow JM, Severson PA.Snow JM, et al. Among authors: severson pa.Surg Clin North Am. 2011 Dec;91(6):1249-64, ix. doi: 10.1016/j.suc.2011.08.008.Surg Clin North Am. 2011.PMID: 22054152Review.