Authors: J T Flaherty; B Pitt; J W Gruber; R R Heuser; D A Rothbaum; L R Burwell; B S George; D J Kereiakes; D Deitchman; N Gustafson Journal: Circulation Date: 1994-05 Impact factor: 29.690
Authors: M J Roberts; I S Young; T G Trouton; E R Trimble; M M Khan; S W Webb; C M Wilson; G C Patterson; A A Adgey Journal: Lancet Date: 1990-07-21 Impact factor: 79.321