Authors: Stef L A M Bronzwaer; Otto Cars; Udo Buchholz; Sigvard Mölstad; Wim Goettsch; Irene K Veldhuijzen; Jacob L Kool; Marc J W Sprenger; John E Degener Journal: Emerg Infect Dis Date: 2002-03 Impact factor: 6.883
Authors: Christopher J Stille; Sheryl L Rifas-Shiman; Ken Kleinman; Jamie B Kotch; Jonathan A Finkelstein Journal: Ann Fam Med Date: 2008 May-Jun Impact factor: 5.166