4HUV:
reference: Preemptive priming readily overcomes structure-based mechanisms of virus escape., Valkenburg SA, Gras S, Guillonneau C, Hatton LA, Bird NA, Twist KA, Halim H, Jackson DC, Purcell AW, Turner SJ, Doherty PC, Rossjohn J, Kedzierska K, Proc Natl Acad Sci U S A. 2013 Mar 14. PMID: 23493558

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