Authors: R W Smithells; N C Nevin; M J Seller; S Sheppard; R Harris; A P Read; D W Fielding; S Walker; C J Schorah; J Wild Journal: Lancet Date: 1983-05-07 Impact factor: 79.321
Authors: J L Mills; G G Rhoads; J L Simpson; G C Cunningham; M R Conley; M R Lassman; M E Walden; O R Depp; H J Hoffman Journal: N Engl J Med Date: 1989-08-17 Impact factor: 91.245