Footnote

d Contemporary Surgery, Matshi 1990, iphe. 45-9; The American Surgeon, Juni 1987, iphe. 350-6; Miami Medicine, Januwari 1981, iphe. 25; New York State Journal of Medicine, Oktobha 15, 1972, iphe. 2524-7; The Journal of the American Medical Association, Novemba 27, 1981, iphe. 2471-2; Cardiovascular News, Februwari 1984, iphe. 5; Circulation, Septemba 1984.