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Authors: B A Perkins; K Jonsdottir; H Briem; E Griffiths; B D Plikaytis; E A Hoiby; E Rosenqvist; J Holst; H Nokleby; F Sotolongo; G Sierra; H C Campa; G M Carlone; D Williams; J Dykes; D Kapczynski; E Tikhomirov; J D Wenger; C V Broome Journal: J Infect Dis Date: 1998-03 Impact factor: 5.226
Authors: J C de Moraes; B A Perkins; M C Camargo; N T Hidalgo; H A Barbosa; C T Sacchi; I M Landgraf; V L Gattas; H de G Vasconcelos; I M Gral Journal: Lancet Date: 1992-10-31 Impact factor: 79.321