JOINT FILING AGREEMENT The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached. Dated: April 10, 2000 ARTISAN INVESTMENT CORPORATION for itself and as general partner of ARTISAN PARTNERS LIMITED PARTNERSHIPJoint Filing Agreement • April 10th, 2000 • Artisan Partners LTD Partnership • Services-health services
Exhibit 1 Joint Filing Agreement dated as of April 10, 2000 by and among Artisan Partners Limited Partnership, Artisan Investment Corporation, Andrew A. Ziegler, and Carlene Murphy Ziegler.Joint Filing Agreement • April 10th, 2000 • Artisan Partners LTD Partnership • Services-health services
