0000950123-00-009231 424B1 1 20001010 LABORATORY CORP OF AMERICA HOLDINGS 0000920148 8071 133757370 DE 1231 424B1 33 333-46776 736821 358 S MAIN ST 4225 EXECUTIVE SQ STE 800 BURLINGTON NC 27215 3362291127 358 S MAIN ST 4225 EXECUTIVE SQ SUITE 800 BURLINGTON NC 27215 NATIONAL HEALTH LABORATORIES HOLDINGS INC 19940314 424B1 1 y41147b1e424b1.txt LBORITORY CORPORATION OF AMERICA HOLDINGS