Fotnot

d Contemporary Surgery, mars 1990, sid. 45—49; The American Surgeon, juni 1987, sid. 350—356; Miami Medicine, januari 1981, sid. 25; New York State Journal of Medicine, 15 oktober 1972, sid. 2524—2527; The Journal of the American Medical Association, 27 november 1981, sid. 2471, 2472; Cardiovascular News, februari 1984, sid. 5; Circulation, september 1984.