Authors: C L Daley; P M Small; G F Schecter; G K Schoolnik; R A McAdam; W R Jacobs; P C Hopewell Journal: N Engl J Med Date: 1992-01-23 Impact factor: 91.245
Authors: E Langhoff; E F Terwilliger; H J Bos; K H Kalland; M C Poznansky; O M Bacon; W A Haseltine Journal: Proc Natl Acad Sci U S A Date: 1991-09-15 Impact factor: 11.205