Authors: S O Foster; E W Brink; D L Hutchins; J M Pifer; B Lourie; C R Moser; E C Cummings; O E Kuteyi; R E Eke; J B Titus; E A Smith; J W Hicks; W H Foege Journal: Bull World Health Organ Date: 1972 Impact factor: 9.408
Authors: J W Hooper; E Thompson; C Wilhelmsen; M Zimmerman; M Ait Ichou; S E Steffen; C S Schmaljohn; A L Schmaljohn; P B Jahrling Journal: J Virol Date: 2004-05 Impact factor: 5.103