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Harpaz R, Ortega-Sanchez IR, Seward JF; Advisory Committee on Immunization Practices (ACIP) Centers for Disease Control and Prevention (CDC).Harpaz R, et al.MMWR Recomm Rep. 2008 Jun 6;57(RR-5):1-30; quiz CE2-4.MMWR Recomm Rep. 2008.PMID: 18528318
Mac Donald R, Baken L, Nelson A, Nichol KL.Mac Donald R, et al. Among authors: nichol kl.Am J Prev Med. 1999 Apr;16(3):173-7. doi: 10.1016/s0749-3797(98)00159-7.Am J Prev Med. 1999.PMID: 10198654
Nichol KL, Mac Donald R, Hauge M.Nichol KL, et al.J Gen Intern Med. 1996 Nov;11(11):673-7. doi: 10.1007/BF02600158.J Gen Intern Med. 1996.PMID: 9120653