Authors: A S Pearlman; J M Gardin; R P Martin; A F Parisi; R L Popp; M A Quinones; J G Stevenson; N B Schiller; J B Seward; W J Stewart Journal: J Am Soc Echocardiogr Date: 1992 Mar-Apr Impact factor: 5.251
Authors: W G Daniel; R Erbel; W Kasper; C A Visser; R Engberding; G R Sutherland; E Grube; P Hanrath; B Maisch; K Dennig Journal: Circulation Date: 1991-03 Impact factor: 29.690