0000920148-03-000137 8-K 2 20030721 9 20030722 LABORATORY CORP OF AMERICA HOLDINGS 0000920148 8071 133757370 DE 1231 8-K 34 001-11353 03795429 358 S MAIN ST BURLINGTON NC 27215 3362291127 358 S MAIN ST BURLINGTON NC 27215 NATIONAL HEALTH LABORATORIES HOLDINGS INC 19940314 8-K 1 psicvr.txt COMPANY 8-K EX-99.1 3 psipress.txt COMPANY PRESS RELEASE