0000950130-98-002260 DEF 14A 1 19980617 19980430 NYSE LABORATORY CORP OF AMERICA HOLDINGS 0000920148 8071 133757370 DE 1231 DEF 14A 34 001-11353 98606385 358 S MAIN ST BURLINGTON NC 27215 3362291127 358 S MAIN ST 4225 EXECUTIVE SQUARE, SUITE 800 BURLINGTON NC 27215 NATIONAL HEALTH LABORATORIES HOLDINGS INC 19940314 DEF 14A 1 000095013098002260-001-seq1-def-14a.txt DEFINITIVE PROXY STATEMENT