Authors: S S Hutchins; J Escolan; L E Markowitz; C Hawkins; A Kimbler; R A Morgan; S R Preblud; W A Orenstein Journal: Pediatrics Date: 1989-03 Impact factor: 7.124
Authors: P S Moore; J Hierholzer; W DeWitt; K Gouan; D Djoré; T Lippeveld; B Plikaytis; C V Broome Journal: JAMA Date: 1990-09-12 Impact factor: 56.272