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Shann F, Nohynek H, Scott JA, Hesseling A, Flanagan KL; Working Group on Nonspecific Effects of Vaccines.Shann F, et al.Pediatr Infect Dis J. 2010 May;29(5):457-61. doi: 10.1097/INF.0b013e3181c91361.Pediatr Infect Dis J. 2010.PMID: 20431383Review.