Authors: Lisa A Jackson; Kathleen M Neuzil; Onchee Yu; Patti Benson; William E Barlow; Annette L Adams; Christi A Hanson; Lisa D Mahoney; David K Shay; William W Thompson Journal: N Engl J Med Date: 2003-05-01 Impact factor: 91.245
Authors: A Vila Córcoles; O Ochoa Gondar; I Hospital Guardiola; X Bria Ferre; C Llor Vila; D Montañes Boncompte Journal: Aten Primaria Date: 2004-02-28 Impact factor: 1.137