Authors: P A Selwyn; D Hartel; V A Lewis; E E Schoenbaum; S H Vermund; R S Klein; A T Walker; G H Friedland Journal: N Engl J Med Date: 1989-03-02 Impact factor: 91.245
Authors: R van den Oever; D de Graeve; B Hepp; A Stroobant; D Walckiers; V Van Casteren; F Van Loock; G Ducoffre; J Dewatripont; P Jacques Journal: Pharmacoeconomics Date: 1993-04 Impact factor: 4.981