Authors: W M Jackman; X Z Wang; K J Friday; C A Roman; K P Moulton; K J Beckman; J H McClelland; N Twidale; H A Hazlitt; M I Prior Journal: N Engl J Med Date: 1991-06-06 Impact factor: 91.245
Authors: G Hindricks; W Haverkamp; H Gülker; U Rissel; T Budde; K D Richter; M Borggrefe; G Breithardt Journal: Eur Heart J Date: 1989-11 Impact factor: 29.983