January 17, 2003

LabCorp(R) Completes Acquisition of DIANON Systems Inc

Combined Company to Significantly Expand Specialized Cancer Testing BURLINGTON, N.C., Jan. 17 /PRNewswire-FirstCall/ -- Laboratory Corporation of America(R) Holdings (NYSE: LH) (LabCorp(R)) today announced it has completed its previously announced acquisition of DIANON Systems Inc., a leading U.S.