Hirschel B, Chang H R, Mach N, Piguet P F, Cox J, Piguet J D, Silva M T, Larsson L, Klatser P R, Thole J E
Department of Medicine, Hôpital Cantonal Universitaire, Geneva, Switzerland.
N Engl J Med. 1990 Jul 12;323(2):109-13. doi: 10.1056/NEJM199007123230207.