NEW YORK, September 18, 2002 — Joseph Berkery, President of Berkery, Noyes & Co., announced today that his firm represented The Thomson Corporation (NYSE: TOC; TSX: TOC) in its sale of MS Mexicana to Cegedim (Euronext: 5350).

MS Mexicana (MSM) is the leading provider of services dedicated to the pharmaceutical industry in Mexico.

Founded in 1973, MSM leads the Mexican pharmaceutical market with a 60% market share, serving over 7,000 users with its call reporting system SegMed. MSM is currently enhancing its medical databases for international purposes.

The Thomson Corporation achieved impressive results with MSM. In 2001, MSM generated a 30% growth rate over the previous year and grew to 120 employees. MSM will continue to deliver and develop their existing products and services with support from Cegedim’s technological knowledge and international experience in the CRM business. Cegedim will expand its offering to the Mexican market with its worldwide leading CRM product, Teams, and its existing services in its medical database business.

With a presence in Mexico, Brazil, Argentina, Colombia, Costa Rica (managing Central America and the Caribbean) and Ecuador, Cegedim is dedicated to being the major medical information, technology and services provider in Central and South America. Cegedim is also committed to serving its clients on a global basis.

About Berkery, Noyes & Co.

Berkery, Noyes specializes in investment banking for the information, publishing and communications industries. Among recent transactions completed by Berkery, Noyes is the acquisition of DDC Publishing by Pearson Education, the sale of Wheeler Publishing to Gale Group, a Thomson business, the sale of selected publishing assets from Thomson to John Wiley & Sons and Oxford University Press and the acquisition of Ariel Research Corporation by Eastman Chemical Company.

Berkery, Noyes & Co. clients range from small firms, often seeking a buyer, to most of the major international information companies, who use the firm’s expertise in locating, analyzing and negotiating with acquisition candidates, as well as in managing divestitures. The firm operates with a staff of twenty-two professionals serving the information and publishing industry from offices in New York, Boston, and San Francisco.