[1] HARVARD UNIV, MASSACHUSETTS EYE & EAR INFIRM, SCH MED, BOSTON, MA 02114 USA
[2] UNIV ROCHESTER, MED CTR, DEPT OPHTHALMOL, ROCHESTER, NY 14642 USA
[3] YALE UNIV, MED CTR, DEPT DERMATOL, NEW HAVEN, CT 06520 USA
[4] SIDNEY FARBER CANC INST, DIV BIOSTAT & EPIDEMIOL, BOSTON, MA 02115 USA
[5] VET ADM MED CTR, DEPT DERMATOL, W HAVEN, CT 06516 USA