Authors: W O Spitzer; S Suissa; P Ernst; R I Horwitz; B Habbick; D Cockcroft; J F Boivin; M McNutt; A S Buist; A S Rebuck Journal: N Engl J Med Date: 1992-02-20 Impact factor: 91.245
Authors: M R Sears; D R Taylor; C G Print; D C Lake; Q Q Li; E M Flannery; D M Yates; M K Lucas; G P Herbison Journal: Lancet Date: 1990-12-08 Impact factor: 79.321