Authors: M R de Leval; R Smyth; B Whitehead; J P Scott; M J Elliott; L Sharples; N Caine; P Helms; I R Martin; T Higenbottam Journal: J Thorac Cardiovasc Surg Date: 1991-04 Impact factor: 5.209
Authors: B A Reitz; J L Wallwork; S A Hunt; J L Pennock; M E Billingham; P E Oyer; E B Stinson; N E Shumway Journal: N Engl J Med Date: 1982-03-11 Impact factor: 91.245