Authors: C F Gilks; R J Brindle; L S Otieno; S M Bhatt; R S Newnham; P M Simani; G N Lule; G B Okelo; W M Watkins; P G Waiyaki Journal: AIDS Date: 1990-10 Impact factor: 4.177
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