Coen P, Kulin H, Ballantine T, Zaino R, Frauenhoffer E, Boal D, Inkster S, Brodie A, Santen R
Department of Medicine, Pennsylvania State University College of Medicine, Hershey 17033.
N Engl J Med. 1991 Jan 31;324(5):317-22. doi: 10.1056/NEJM199101313240507.