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Authors: F Gao; E Bailes; D L Robertson; Y Chen; C M Rodenburg; S F Michael; L B Cummins; L O Arthur; M Peeters; G M Shaw; P M Sharp; B H Hahn Journal: Nature Date: 1999-02-04 Impact factor: 49.962
Authors: W Winkelstein; J A Wiley; N S Padian; M Samuel; S Shiboski; M S Ascher; J A Levy Journal: Am J Public Health Date: 1988-11 Impact factor: 9.308