Authors: S J Saunders; J Terblanche; S C Bosman; G G Harrison; R Walls; R Hickman; J Biebuyck; D Dent; S Pearce; C N Barnard Journal: Lancet Date: 1968-09-14 Impact factor: 79.321
Authors: J M Burnell; J K Dawborn; R B Epstein; R A Gutman; G E Leinbach; E D Thomas; W Volwiler Journal: N Engl J Med Date: 1967-04-27 Impact factor: 91.245