Authors: K Nademanee; D A Gorelick; M A Josephson; M A Ryan; J N Wilkins; H A Robertson; F V Mody; V Intarachot Journal: Ann Intern Med Date: 1989-12-01 Impact factor: 25.391
Authors: R A Lange; R G Cigarroa; C W Yancy; J E Willard; J J Popma; M N Sills; W McBride; A S Kim; L D Hillis Journal: N Engl J Med Date: 1989-12-07 Impact factor: 91.245