Authors: J J Langberg; A Leon; M Borganelli; S J Kalbfleisch; R el-Atassi; H Calkins; F Morady Journal: Circulation Date: 1993-05 Impact factor: 29.690
Authors: H Kottkamp; G Hindricks; S Willems; X Chen; L Reinhardt; W Haverkamp; G Breithardt; M Borggrefe Journal: J Am Coll Cardiol Date: 1995-04 Impact factor: 24.094