00314nas a2200133   4500000000100000000000100001008004100002100001200043700001500055245007600070300001300146490000700159022001400166       2010                            d1 aH. Jick1 aK. Hagberg00aEffectiveness of influenza vaccination in the United kingdom, 1996-2007  a1199-2060 v30  a0277-0008