Authors: J B Seward; B K Khandheria; J K Oh; M D Abel; R W Hughes; W D Edwards; B A Nichols; W K Freeman; A J Tajik Journal: Mayo Clin Proc Date: 1988-07 Impact factor: 7.616
Authors: S T Shulman; D P Amren; A L Bisno; A S Dajani; D T Durack; M A Gerber; E L Kaplan; H D Millard; W E Sanders; R H Schwartz Journal: Circulation Date: 1984-12 Impact factor: 29.690