From W.K. Kellogg Eye Center (A.S.), University of Michigan, Ann Arbor, Michigan; and the University of Illinois Eye Center (J.S.), Chicago, Illinois, U.S.A.
Submitted February 8, 2000.
Accepted March 18, 2000.
Address correspondence and reprint requests to Dr. Alan Sugar, Kellogg Eye Center, 1000 Wall St, Ann Arbor, MI 48105, U.S.A. E-mail: firstname.lastname@example.org